first_day_of_month Returns the first day of a month
package require nstcl-time ?1.0.1?
package require nstcl ?1.0?
::nstcl::first_day_of_month ?-format format? date
Returns the (trivial) first date of the month containing the given date. The format of date can be anything that [clock scan] can parse.
This function is mostly for symetry with last_day_of_month, first_day_of_week, and last_day_of_week.
- -format (defaults to %Y-%m-%d)
- Specifies the format that the first date of the month should be returned in. Consult the documentation for the [clock format] command for a list of valid field descriptors.