DateDifference
DateDifference[date1, date2] gives the number of days between two dates. DateDifference[date1, date2, "unit"] uses specified units.
Examples
Calculate time differences:
DateDifference[{2024, 1, 1}, {2024, 12, 31}]
(* Quantity[365, "Days"] *)
(* In months *)
DateDifference[{2020, 1, 1}, {2024, 1, 1}, "Year"]
(* Quantity[4, "Years"] *)
(* Multiple units *)
DateDifference[{2024, 1, 1}, {2025, 6, 15}, {"Year", "Month", "Day"}]Please visit the official Wolfram Language Reference for more details.