ReadonlydayDay of month, 1-based. 0 for 1900-01-00.
ReadonlydowDay of week, 1 = Monday ... 7 = Sunday.
ReadonlyhourHour on a 24-hour clock.
ReadonlymillisMilliseconds.
ReadonlyminuteMinute of the hour.
Readonlymonth1 = January ... 12 = December.
ReadonlysecondSecond of the minute.
ReadonlyyearFull year.
A serial date split into fields — see IFormulaContext.getDateParts.
Remarks
These are the spreadsheet calendar's fields, not the Gregorian one's:
daymay be0(1900-01-00) and February 1900 has 29 days.