Date & Calendar

`date`

Print or set the system date and time.

Example:

Simple usage of date to display current date & time.
```
$ date
Fri Aug 21 18:25:31 IST 2020
```
Set system time using -s or --setcommand.
```
$ date -s "11/20/2021 12:30:00"
```

Format the date that is printed using the following

//tab
+----------------+------------------------------------+
| Format         | Specifies                          |
+----------------+------------------------------------+
| +%m            | Month number                       |
| +%h            | Abbrivieated month (Jan, Feb, etc) |
| +%B            | Full month name                    |
| +%d            | Day of the month                   |
| +%y            | Year                               |
| +%H, +%M & +%S | Hour, minute & seconds             |
| +%D            | Date as mm/dd/yy                   |
| +%T            | Time as hh:mm:ss                   |
+----------------+------------------------------------+

$ date "+%d-%h-%y"
21-Aug-20

`cal`

Displays a calendar.

<aside> 💡 Use ncal for an alternative layout.

</aside>

Example:

Simple use of cal

$ cal
    August 2020
Su Mo Tu We Th Fr Sa
                   1
 2  3  4  5  6  7  8
 9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31

Use -y to display the calendar of the specified year.
Use -m to display the calendar of the specified month (month is a decimal number).

Miscellaneous

`alias`

Define or display aliases. Without arguments, alias' prints the list of aliases in the reusable form alias NAME=VALUE on standard output.

Syntax: alias [-p] [name=value]