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Add cal command (#1739)

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* Add cal command

* Fix docmentation to show commands on two lines

* Use bullet points on flag documentation for cal

* Dereference day before calling string method

* Silence Clippy warning regarding a function with too many arguments

* Update cal flag descriptions and documentation

* Add some tests for the cal command
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Joseph T. Lyons 2020-05-09 19:05:48 -04:00 committed by GitHub
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1
crates/nu-cli/src/cli.rs
View File

@ -251,6 +251,7 @@ pub fn create_default_context(
whole_stream_command(Touch), whole_stream_command(Touch),
whole_stream_command(Cpy), whole_stream_command(Cpy),
whole_stream_command(Date), whole_stream_command(Date),
whole_stream_command(Cal),
whole_stream_command(Calc), whole_stream_command(Calc),
whole_stream_command(Mkdir), whole_stream_command(Mkdir),
whole_stream_command(Move), whole_stream_command(Move),

2
crates/nu-cli/src/commands.rs
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@ -8,6 +8,7 @@ pub(crate) mod alias;
pub(crate) mod append; pub(crate) mod append;
pub(crate) mod args; pub(crate) mod args;
pub(crate) mod autoview; pub(crate) mod autoview;
pub(crate) mod cal;
pub(crate) mod calc; pub(crate) mod calc;
pub(crate) mod cd; pub(crate) mod cd;
pub(crate) mod classified; pub(crate) mod classified;
@ -128,6 +129,7 @@ pub(crate) use command::{whole_stream_command, Command, UnevaluatedCallInfo, Who
pub(crate) use alias::Alias; pub(crate) use alias::Alias;
pub(crate) use append::Append; pub(crate) use append::Append;
pub(crate) use cal::Cal;
pub(crate) use calc::Calc; pub(crate) use calc::Calc;
pub(crate) use compact::Compact; pub(crate) use compact::Compact;
pub(crate) use config::Config; pub(crate) use config::Config;

261
crates/nu-cli/src/commands/cal.rs Normal file
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@ -0,0 +1,261 @@
use crate::prelude::*;
use chrono::{DateTime, Datelike, Local, NaiveDate};
use nu_errors::ShellError;
use nu_protocol::Dictionary;
use crate::commands::WholeStreamCommand;
use indexmap::IndexMap;
use nu_protocol::{Signature, SyntaxShape, UntaggedValue, Value};
pub struct Cal;
impl WholeStreamCommand for Cal {
fn name(&self) -> &str {
"cal"
}
fn signature(&self) -> Signature {
Signature::build("cal")
.switch(
"month-names",
"Display the month names instead of integers",
Some('m'),
)
.named(
"year",
SyntaxShape::Int,
"Display a year-long calendar for the specified year",
Some('y'),
)
}
fn usage(&self) -> &str {
"Display a calendar."
}
fn run(
&self,
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
cal(args, registry)
}
}
pub fn cal(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let args = args.evaluate_once(registry)?;
let mut calendar_vec_deque = VecDeque::new();
let tag = args.call_info.name_tag.clone();
let (current_year, current_month, current_day) = get_current_date();
let should_show_month_names = args.has("month-names");
if args.has("year") {
let mut day_value: Option<u32> = Some(current_day);
let year_option = args.get("year");
let mut year_value = current_year as u64;
if let Some(year) = year_option {
if let Ok(year_u64) = year.as_u64() {
year_value = year_u64;
}
if year_value != current_year as u64 {
day_value = None
}
}
add_year_to_table(
&mut calendar_vec_deque,
&tag,
year_value as i32,
current_year,
current_month,
day_value,
should_show_month_names,
);
} else {
let (day_start_offset, number_of_days_in_month, _) =
get_month_information(current_year, current_month, current_year);
add_month_to_table(
&mut calendar_vec_deque,
&tag,
current_year,
current_month,
Some(current_day),
day_start_offset,
number_of_days_in_month as usize,
should_show_month_names,
);
}
Ok(futures::stream::iter(calendar_vec_deque).to_output_stream())
}
fn get_current_date() -> (i32, u32, u32) {
let local_now: DateTime<Local> = Local::now();
let current_year: i32 = local_now.date().year();
let current_month: u32 = local_now.date().month();
let current_day: u32 = local_now.date().day();
(current_year, current_month, current_day)
}
fn add_year_to_table(
mut calendar_vec_deque: &mut VecDeque<Value>,
tag: &Tag,
mut selected_year: i32,
current_year: i32,
current_month: u32,
current_day_option: Option<u32>,
should_show_month_names: bool,
) {
for month_number in 1..=12 {
let (day_start_offset, number_of_days_in_month, chosen_date_is_valid) =
get_month_information(selected_year, month_number, current_year);
if !chosen_date_is_valid {
selected_year = current_year;
}
let mut new_current_day_option: Option<u32> = None;
if let Some(current_day) = current_day_option {
if month_number == current_month {
new_current_day_option = Some(current_day)
}
}
add_month_to_table(
&mut calendar_vec_deque,
&tag,
selected_year,
month_number,
new_current_day_option,
day_start_offset,
number_of_days_in_month,
should_show_month_names,
);
}
}
#[allow(clippy::too_many_arguments)]
fn add_month_to_table(
calendar_vec_deque: &mut VecDeque<Value>,
tag: &Tag,
year: i32,
month: u32,
_current_day_option: Option<u32>, // Can be used in the future to display current day
day_start_offset: usize,
number_of_days_in_month: usize,
should_show_month_names: bool,
) {
let day_limit = number_of_days_in_month + day_start_offset;
let mut day_count: usize = 1;
let days_of_the_week = [
"sunday",
"monday",
"tuesday",
"wednesday",
"thurday",
"friday",
"saturday",
];
while day_count <= day_limit {
let mut indexmap = IndexMap::new();
indexmap.insert("year".to_string(), UntaggedValue::int(year).into_value(tag));
let month_value = if should_show_month_names {
UntaggedValue::string(get_month_name(month)).into_value(tag)
} else {
UntaggedValue::int(month).into_value(tag)
};
indexmap.insert("month".to_string(), month_value);
for day in &days_of_the_week {
let value = if (day_count <= day_limit) && (day_count > day_start_offset) {
UntaggedValue::int(day_count - day_start_offset).into_value(tag)
} else {
UntaggedValue::nothing().into_value(tag)
};
indexmap.insert((*day).to_string(), value);
day_count += 1;
}
calendar_vec_deque
.push_back(UntaggedValue::Row(Dictionary::from(indexmap)).into_value(tag));
}
}
fn get_month_name(month_number: u32) -> String {
let month_name = match month_number {
1 => "january",
2 => "february",
3 => "march",
4 => "april",
5 => "may",
6 => "june",
7 => "july",
8 => "august",
9 => "september",
10 => "october",
11 => "november",
_ => "december",
};
month_name.to_string()
}
fn get_month_information(
selected_year: i32,
month: u32,
current_year: i32,
) -> (usize, usize, bool) {
let (naive_date, chosen_date_is_valid_one) =
get_safe_naive_date(selected_year, month, current_year);
let weekday = naive_date.weekday();
let (days_in_month, chosen_date_is_valid_two) =
get_days_in_month(selected_year, month, current_year);
(
weekday.num_days_from_sunday() as usize,
days_in_month,
chosen_date_is_valid_one && chosen_date_is_valid_two,
)
}
fn get_days_in_month(selected_year: i32, month: u32, current_year: i32) -> (usize, bool) {
// Chrono does not provide a method to output the amount of days in a month
// This is a workaround taken from the example code from the Chrono docs here:
// https://docs.rs/chrono/0.3.0/chrono/naive/date/struct.NaiveDate.html#example-30
let (adjusted_year, adjusted_month) = if month == 12 {
(selected_year + 1, 1)
} else {
(selected_year, month + 1)
};
let (naive_date, chosen_date_is_valid) =
get_safe_naive_date(adjusted_year, adjusted_month, current_year);
(naive_date.pred().day() as usize, chosen_date_is_valid)
}
fn get_safe_naive_date(
selected_year: i32,
selected_month: u32,
current_year: i32,
) -> (NaiveDate, bool) {
if let Some(naive_date) = NaiveDate::from_ymd_opt(selected_year, selected_month, 1) {
return (naive_date, true);
}
(NaiveDate::from_ymd(current_year, selected_month, 1), false)
}

39
crates/nu-cli/tests/commands/cal.rs Normal file
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@ -0,0 +1,39 @@
use nu_test_support::{nu, pipeline};
#[test]
fn cal_february_2020_leap_year() {
let actual = nu!(
cwd: ".", pipeline(
r#"
cal -my 2020 | where month == "february" | to json
"#
));
let cal_february_json = r#"[{"year":2020,"month":"february","sunday":null,"monday":null,"tuesday":null,"wednesday":null,"thurday":null,"friday":null,"saturday":1},{"year":2020,"month":"february","sunday":2,"monday":3,"tuesday":4,"wednesday":5,"thurday":6,"friday":7,"saturday":8},{"year":2020,"month":"february","sunday":9,"monday":10,"tuesday":11,"wednesday":12,"thurday":13,"friday":14,"saturday":15},{"year":2020,"month":"february","sunday":16,"monday":17,"tuesday":18,"wednesday":19,"thurday":20,"friday":21,"saturday":22},{"year":2020,"month":"february","sunday":23,"monday":24,"tuesday":25,"wednesday":26,"thurday":27,"friday":28,"saturday":29}]"#;
assert_eq!(actual.out, cal_february_json);
}
#[test]
fn cal_friday_the_thirteenths_in_2015() {
let actual = nu!(
cwd: ".", pipeline(
r#"
cal -ym 2015 | where friday == 13 | count
"#
));
assert!(actual.out.contains("3"));
}
#[test]
fn cal_rows_in_2020() {
let actual = nu!(
cwd: ".", pipeline(
r#"
cal -y 2020 | count
"#
));
assert!(actual.out.contains("62"));
}

1
crates/nu-cli/tests/commands/mod.rs
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@ -1,5 +1,6 @@
mod alias; mod alias;
mod append; mod append;
mod cal;
mod calc; mod calc;
mod cd; mod cd;
mod compact; mod compact;

188
docs/commands/cal.md Normal file
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@ -0,0 +1,188 @@
# cal
Use `cal` to display a calendar.
## Flags
* `-m`, `--month-names`: Display the month names instead of integers
* `-y`, `--year`: Display a year-long calendar for the specified year
## Examples
```shell
> cal
───┬──────┬───────┬────────┬────────┬─────────┬───────────┬─────────┬────────┬──────────
# │ year │ month │ sunday │ monday │ tuesday │ wednesday │ thurday │ friday │ saturday
───┼──────┼───────┼────────┼────────┼─────────┼───────────┼─────────┼────────┼──────────
0 │ 2020 │ 5 │ │ │ │ │ │ 1 │ 2
1 │ 2020 │ 5 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9
2 │ 2020 │ 5 │ 10 │ 11 │ 12 │ 13 │ 14 │ 15 │ 16
3 │ 2020 │ 5 │ 17 │ 18 │ 19 │ 20 │ 21 │ 22 │ 23
4 │ 2020 │ 5 │ 24 │ 25 │ 26 │ 27 │ 28 │ 29 │ 30
5 │ 2020 │ 5 │ 31 │ │ │ │ │ │
───┴──────┴───────┴────────┴────────┴─────────┴───────────┴─────────┴────────┴──────────
```
```shell
> cal -y 2020
────┬──────┬───────┬────────┬────────┬─────────┬───────────┬─────────┬────────┬──────────
# │ year │ month │ sunday │ monday │ tuesday │ wednesday │ thurday │ friday │ saturday
────┼──────┼───────┼────────┼────────┼─────────┼───────────┼─────────┼────────┼──────────
0 │ 2020 │ 1 │ │ │ │ 1 │ 2 │ 3 │ 4
1 │ 2020 │ 1 │ 5 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11
2 │ 2020 │ 1 │ 12 │ 13 │ 14 │ 15 │ 16 │ 17 │ 18
3 │ 2020 │ 1 │ 19 │ 20 │ 21 │ 22 │ 23 │ 24 │ 25
4 │ 2020 │ 1 │ 26 │ 27 │ 28 │ 29 │ 30 │ 31 │
5 │ 2020 │ 2 │ │ │ │ │ │ │ 1
6 │ 2020 │ 2 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8
7 │ 2020 │ 2 │ 9 │ 10 │ 11 │ 12 │ 13 │ 14 │ 15
8 │ 2020 │ 2 │ 16 │ 17 │ 18 │ 19 │ 20 │ 21 │ 22
9 │ 2020 │ 2 │ 23 │ 24 │ 25 │ 26 │ 27 │ 28 │ 29
10 │ 2020 │ 3 │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7
11 │ 2020 │ 3 │ 8 │ 9 │ 10 │ 11 │ 12 │ 13 │ 14
12 │ 2020 │ 3 │ 15 │ 16 │ 17 │ 18 │ 19 │ 20 │ 21
13 │ 2020 │ 3 │ 22 │ 23 │ 24 │ 25 │ 26 │ 27 │ 28
14 │ 2020 │ 3 │ 29 │ 30 │ 31 │ │ │ │
15 │ 2020 │ 4 │ │ │ │ 1 │ 2 │ 3 │ 4
16 │ 2020 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11
17 │ 2020 │ 4 │ 12 │ 13 │ 14 │ 15 │ 16 │ 17 │ 18
18 │ 2020 │ 4 │ 19 │ 20 │ 21 │ 22 │ 23 │ 24 │ 25
19 │ 2020 │ 4 │ 26 │ 27 │ 28 │ 29 │ 30 │ │
20 │ 2020 │ 5 │ │ │ │ │ │ 1 │ 2
21 │ 2020 │ 5 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9
22 │ 2020 │ 5 │ 10 │ 11 │ 12 │ 13 │ 14 │ 15 │ 16
23 │ 2020 │ 5 │ 17 │ 18 │ 19 │ 20 │ 21 │ 22 │ 23
24 │ 2020 │ 5 │ 24 │ 25 │ 26 │ 27 │ 28 │ 29 │ 30
25 │ 2020 │ 5 │ 31 │ │ │ │ │ │
26 │ 2020 │ 6 │ │ 1 │ 2 │ 3 │ 4 │ 5 │ 6
27 │ 2020 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11 │ 12 │ 13
28 │ 2020 │ 6 │ 14 │ 15 │ 16 │ 17 │ 18 │ 19 │ 20
29 │ 2020 │ 6 │ 21 │ 22 │ 23 │ 24 │ 25 │ 26 │ 27
30 │ 2020 │ 6 │ 28 │ 29 │ 30 │ │ │ │
31 │ 2020 │ 7 │ │ │ │ 1 │ 2 │ 3 │ 4
32 │ 2020 │ 7 │ 5 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11
33 │ 2020 │ 7 │ 12 │ 13 │ 14 │ 15 │ 16 │ 17 │ 18
34 │ 2020 │ 7 │ 19 │ 20 │ 21 │ 22 │ 23 │ 24 │ 25
35 │ 2020 │ 7 │ 26 │ 27 │ 28 │ 29 │ 30 │ 31 │
36 │ 2020 │ 8 │ │ │ │ │ │ │ 1
37 │ 2020 │ 8 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8
38 │ 2020 │ 8 │ 9 │ 10 │ 11 │ 12 │ 13 │ 14 │ 15
39 │ 2020 │ 8 │ 16 │ 17 │ 18 │ 19 │ 20 │ 21 │ 22
40 │ 2020 │ 8 │ 23 │ 24 │ 25 │ 26 │ 27 │ 28 │ 29
41 │ 2020 │ 8 │ 30 │ 31 │ │ │ │ │
42 │ 2020 │ 9 │ │ │ 1 │ 2 │ 3 │ 4 │ 5
43 │ 2020 │ 9 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11 │ 12
44 │ 2020 │ 9 │ 13 │ 14 │ 15 │ 16 │ 17 │ 18 │ 19
45 │ 2020 │ 9 │ 20 │ 21 │ 22 │ 23 │ 24 │ 25 │ 26
46 │ 2020 │ 9 │ 27 │ 28 │ 29 │ 30 │ │ │
47 │ 2020 │ 10 │ │ │ │ │ 1 │ 2 │ 3
48 │ 2020 │ 10 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 10
49 │ 2020 │ 10 │ 11 │ 12 │ 13 │ 14 │ 15 │ 16 │ 17
50 │ 2020 │ 10 │ 18 │ 19 │ 20 │ 21 │ 22 │ 23 │ 24
51 │ 2020 │ 10 │ 25 │ 26 │ 27 │ 28 │ 29 │ 30 │ 31
52 │ 2020 │ 11 │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7
53 │ 2020 │ 11 │ 8 │ 9 │ 10 │ 11 │ 12 │ 13 │ 14
54 │ 2020 │ 11 │ 15 │ 16 │ 17 │ 18 │ 19 │ 20 │ 21
55 │ 2020 │ 11 │ 22 │ 23 │ 24 │ 25 │ 26 │ 27 │ 28
56 │ 2020 │ 11 │ 29 │ 30 │ │ │ │ │
57 │ 2020 │ 12 │ │ │ 1 │ 2 │ 3 │ 4 │ 5
58 │ 2020 │ 12 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11 │ 12
59 │ 2020 │ 12 │ 13 │ 14 │ 15 │ 16 │ 17 │ 18 │ 19
60 │ 2020 │ 12 │ 20 │ 21 │ 22 │ 23 │ 24 │ 25 │ 26
61 │ 2020 │ 12 │ 27 │ 28 │ 29 │ 30 │ 31 │ │
────┴──────┴───────┴────────┴────────┴─────────┴───────────┴─────────┴────────┴──────────
```
```shell
> cal -my 2020
────┬──────┬───────────┬────────┬────────┬─────────┬───────────┬─────────┬────────┬──────────
# │ year │ month │ sunday │ monday │ tuesday │ wednesday │ thurday │ friday │ saturday
────┼──────┼───────────┼────────┼────────┼─────────┼───────────┼─────────┼────────┼──────────
0 │ 2020 │ january │ │ │ │ 1 │ 2 │ 3 │ 4
1 │ 2020 │ january │ 5 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11
2 │ 2020 │ january │ 12 │ 13 │ 14 │ 15 │ 16 │ 17 │ 18
3 │ 2020 │ january │ 19 │ 20 │ 21 │ 22 │ 23 │ 24 │ 25
4 │ 2020 │ january │ 26 │ 27 │ 28 │ 29 │ 30 │ 31 │
5 │ 2020 │ february │ │ │ │ │ │ │ 1
6 │ 2020 │ february │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8
7 │ 2020 │ february │ 9 │ 10 │ 11 │ 12 │ 13 │ 14 │ 15
8 │ 2020 │ february │ 16 │ 17 │ 18 │ 19 │ 20 │ 21 │ 22
9 │ 2020 │ february │ 23 │ 24 │ 25 │ 26 │ 27 │ 28 │ 29
10 │ 2020 │ march │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7
11 │ 2020 │ march │ 8 │ 9 │ 10 │ 11 │ 12 │ 13 │ 14
12 │ 2020 │ march │ 15 │ 16 │ 17 │ 18 │ 19 │ 20 │ 21
13 │ 2020 │ march │ 22 │ 23 │ 24 │ 25 │ 26 │ 27 │ 28
14 │ 2020 │ march │ 29 │ 30 │ 31 │ │ │ │
15 │ 2020 │ april │ │ │ │ 1 │ 2 │ 3 │ 4
16 │ 2020 │ april │ 5 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11
17 │ 2020 │ april │ 12 │ 13 │ 14 │ 15 │ 16 │ 17 │ 18
18 │ 2020 │ april │ 19 │ 20 │ 21 │ 22 │ 23 │ 24 │ 25
19 │ 2020 │ april │ 26 │ 27 │ 28 │ 29 │ 30 │ │
20 │ 2020 │ may │ │ │ │ │ │ 1 │ 2
21 │ 2020 │ may │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9
22 │ 2020 │ may │ 10 │ 11 │ 12 │ 13 │ 14 │ 15 │ 16
23 │ 2020 │ may │ 17 │ 18 │ 19 │ 20 │ 21 │ 22 │ 23
24 │ 2020 │ may │ 24 │ 25 │ 26 │ 27 │ 28 │ 29 │ 30
25 │ 2020 │ may │ 31 │ │ │ │ │ │
26 │ 2020 │ june │ │ 1 │ 2 │ 3 │ 4 │ 5 │ 6
27 │ 2020 │ june │ 7 │ 8 │ 9 │ 10 │ 11 │ 12 │ 13
28 │ 2020 │ june │ 14 │ 15 │ 16 │ 17 │ 18 │ 19 │ 20
29 │ 2020 │ june │ 21 │ 22 │ 23 │ 24 │ 25 │ 26 │ 27
30 │ 2020 │ june │ 28 │ 29 │ 30 │ │ │ │
31 │ 2020 │ july │ │ │ │ 1 │ 2 │ 3 │ 4
32 │ 2020 │ july │ 5 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11
33 │ 2020 │ july │ 12 │ 13 │ 14 │ 15 │ 16 │ 17 │ 18
34 │ 2020 │ july │ 19 │ 20 │ 21 │ 22 │ 23 │ 24 │ 25
35 │ 2020 │ july │ 26 │ 27 │ 28 │ 29 │ 30 │ 31 │
36 │ 2020 │ august │ │ │ │ │ │ │ 1
37 │ 2020 │ august │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8
38 │ 2020 │ august │ 9 │ 10 │ 11 │ 12 │ 13 │ 14 │ 15
39 │ 2020 │ august │ 16 │ 17 │ 18 │ 19 │ 20 │ 21 │ 22
40 │ 2020 │ august │ 23 │ 24 │ 25 │ 26 │ 27 │ 28 │ 29
41 │ 2020 │ august │ 30 │ 31 │ │ │ │ │
42 │ 2020 │ september │ │ │ 1 │ 2 │ 3 │ 4 │ 5
43 │ 2020 │ september │ 6 │ 7 │ 8 │ 9 │ 10 │ 11 │ 12
44 │ 2020 │ september │ 13 │ 14 │ 15 │ 16 │ 17 │ 18 │ 19
45 │ 2020 │ september │ 20 │ 21 │ 22 │ 23 │ 24 │ 25 │ 26
46 │ 2020 │ september │ 27 │ 28 │ 29 │ 30 │ │ │
47 │ 2020 │ october │ │ │ │ │ 1 │ 2 │ 3
48 │ 2020 │ october │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 10
49 │ 2020 │ october │ 11 │ 12 │ 13 │ 14 │ 15 │ 16 │ 17
50 │ 2020 │ october │ 18 │ 19 │ 20 │ 21 │ 22 │ 23 │ 24
51 │ 2020 │ october │ 25 │ 26 │ 27 │ 28 │ 29 │ 30 │ 31
52 │ 2020 │ november │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7
53 │ 2020 │ november │ 8 │ 9 │ 10 │ 11 │ 12 │ 13 │ 14
54 │ 2020 │ november │ 15 │ 16 │ 17 │ 18 │ 19 │ 20 │ 21
55 │ 2020 │ november │ 22 │ 23 │ 24 │ 25 │ 26 │ 27 │ 28
56 │ 2020 │ november │ 29 │ 30 │ │ │ │ │
57 │ 2020 │ december │ │ │ 1 │ 2 │ 3 │ 4 │ 5
58 │ 2020 │ december │ 6 │ 7 │ 8 │ 9 │ 10 │ 11 │ 12
59 │ 2020 │ december │ 13 │ 14 │ 15 │ 16 │ 17 │ 18 │ 19
60 │ 2020 │ december │ 20 │ 21 │ 22 │ 23 │ 24 │ 25 │ 26
61 │ 2020 │ december │ 27 │ 28 │ 29 │ 30 │ 31 │ │
────┴──────┴───────────┴────────┴────────┴─────────┴───────────┴─────────┴────────┴──────────
```
```shell
> cal -my 2303 | where month == "june"
───┬──────┬───────┬────────┬────────┬─────────┬───────────┬─────────┬────────┬──────────
# │ year │ month │ sunday │ monday │ tuesday │ wednesday │ thurday │ friday │ saturday
───┼──────┼───────┼────────┼────────┼─────────┼───────────┼─────────┼────────┼──────────
0 │ 2303 │ june │ │ 1 │ 2 │ 3 │ 4 │ 5 │ 6
1 │ 2303 │ june │ 7 │ 8 │ 9 │ 10 │ 11 │ 12 │ 13
2 │ 2303 │ june │ 14 │ 15 │ 16 │ 17 │ 18 │ 19 │ 20
3 │ 2303 │ june │ 21 │ 22 │ 23 │ 24 │ 25 │ 26 │ 27
4 │ 2303 │ june │ 28 │ 29 │ 30 │ │ │ │
───┴──────┴───────┴────────┴────────┴─────────┴───────────┴─────────┴────────┴──────────
```
```shell
> cal -my 2020 | where friday == 13
───┬──────┬──────────┬────────┬────────┬─────────┬───────────┬─────────┬────────┬──────────
# │ year │ month │ sunday │ monday │ tuesday │ wednesday │ thurday │ friday │ saturday
───┼──────┼──────────┼────────┼────────┼─────────┼───────────┼─────────┼────────┼──────────
0 │ 2020 │ march │ 8 │ 9 │ 10 │ 11 │ 12 │ 13 │ 14
1 │ 2020 │ november │ 8 │ 9 │ 10 │ 11 │ 12 │ 13 │ 14
───┴──────┴──────────┴────────┴────────┴─────────┴───────────┴─────────┴────────┴──────────
```