4.3.2.8. Temporal functions

Returns the Gregorian number of the day of the year.

day of year( date(2019, 9, 17) ) = 260

Returns the Gregorian day of the week: "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", or "Sunday".

day of week( date(2019, 9, 17) ) = "Tuesday"

Returns the Gregorian month of the year: "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", or "December".

month of year( date(2019, 9, 17) ) = "September"

Returns the Gregorian week of the year as defined by ISO 8601.

week of year( date(2019, 9, 17) ) = 38
week of year( date(2003, 12, 29) ) = 1
week of year( date(2004, 1, 4) ) = 1
week of year( date(2005, 1, 1) ) = 53
week of year( date(2005, 1, 3) ) = 1
week of year( date(2005, 1, 9) ) = 1