Determines the time zone abbreviation to be used during a particular @interval of time in the time zone @tz.
For example, in Toronto this is currently "EST" during the winter months and "EDT" during the summer months when daylight savings time is in effect.
an interval within the timezone
Return: the time zone abbreviation, which belongs to @tz
2.26
See Implementation
Determines the time zone abbreviation to be used during a particular @interval of time in the time zone @tz.
For example, in Toronto this is currently "EST" during the winter months and "EDT" during the summer months when daylight savings time is in effect.