NAME
  date - write the date and time

SYNOPSIS
  date [-u] [format...]

DESCRIPTION
  The date utility shall write the date and time to standard output or attempt to
  set the system date and time. By default, the current date and time shall be
  written. If an operand beginning with '+' is specified, the output format of
  date shall be controlled by the conversion specifications and other text in the
  operand.

OPERANDS
  format  When the format is specified, each conversion specifier shall be
          replaced in the standard output by its corresponding value. All other
          characters shall be copied to the output without change. The output
          shall always be terminated with a <newline>.

OPTIONS
  -u  Perform operations as if the TZ environment variable was set to the
      string 'UTC0', or its equivalent historical value of 'GMT0'. Otherwise,
      date shall use the timezone indicated by the TZ environment variable or
      the system default if that variable is unset or null.