DateTimeExtensions
Just a sample site of a possible usage of DateTimeExtensions nuget package.
New Zealand (en-NZ) change
Holidays
January 01 New Year
January 02 Day after New Year's Day
January 03 New Year Observed
February 06 Waitangi Day
March 30 Good Friday
April 01 Easter
April 02 Easter Monday
April 25 Anzac Day
June 04 Queen's Birthday
October 22 Labour Day
December 25 Christmas
December 26 Boxing Day