Origin Labtalk functions belong to Date and Time category are moved to VC level to have faster speed.

E.g.

Column A is filled with 1million rows of date data

Set Column B formula as WeekDayName(A)

In Origin 2019b and earlier build, it took about 95 sec, while in Origin 2020, it only takes about 1 sec.

Note: In Set Column Values dialog, you can click Function: Date and Time menu to see all date and time functions Origin supports.