DateList

WMA link


DateList[]

returns the current local time in the form {year, month, day, hour, minute, second}.

DateList[time]

returns a formatted date for the number of seconds time since epoch Jan 1 1900.

DateList[{y, m, d, h, m, s}]

converts an incomplete date list to the standard representation.

If not specified, the current year assumed

DateDifference
DateObject