The date command on macOS.

Samples

Today

  • Default 
      $ date
  Wed Aug 26 19:40:21 SAST 2020
  • Unix timestamp. 
      $ date '+%s'
  1598463660
  • Date. 
      $ date '+%Y-%m-%d'
  2020-08-26
  • Date and time. 
      $ date '+%Y-%m-%d %T'
  2020-08-26 19:42:40

Difference

Get tomorrow’s time - use -v to adjust value. See formats.

  • Default. 
      $ date -v+1d
  Thu Aug 27 19:39:11 SAST 2020
  • Unix timestamp. 
      $ date -v+1d '+%s'
  1578085208

Target time

$ date -r 1000000000
Sun Sep  9 03:46:40 SAST 2001

CLI

$ which date
/bin/date

There is no --help command but trying it still gives usage.

usage: date [-jnRu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ...
            [-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]

Man page

$ man date

DATE(1)                   BSD General Commands Manual                  DATE(1)

NAME
     date -- display or set date and time

SYNOPSIS
     date [-jRu] [-r seconds | filename] [-v [+|-]val[ymwdHMS]] ... [+output_fmt]
     date [-jnu] [[[mm]dd]HH]MM[[cc]yy][.ss]
     date [-jnRu] -f input_fmt new_date [+output_fmt]
     date [-d dst] [-t minutes_west]

DESCRIPTION
     When invoked without arguments, the date utility displays the current date and time.  Other-
     wise, depending on the options specified, date will set the date and time or print it in a
     user-defined way.
     ...