Power Query M formula language: Keywords #date, #datetime, #time and #datetimezone

#date(year as number, month as number, day as number) as date

#datetime(year as number, month as number, day as number, hour as number, minute as number, second as number) as any

#time(hour as number, minute as number, second as number) as time

#datetimezone(year as number, month as number, day as number, hour as number, minute as number, second as number, offsetHours as number, offsetMinutes as number) as any