date-time-ywd-day

Arguments: date-time

Returns the value in the ywd-day (the day in the week, with Monday being 1 and Sunday 7, in week date calendars) slot of date-time, which must be a date-time object. The value is nil if the slot is not set. Otherwise it is an integer from 1 to 7. This value cannot be changed with setf and this function.

See date-time.htm for information on support in Allegro CL for parsing and generating time expressions using the ISO 8601 standard.

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Created 2010.1.21.