The date for the Northland by-election has been confirmed for the end of March.
Prime Minister John Key today announced the date had been set for Saturday, March 28.
It follows the resignation of Northland MP Mike Sabin, who stood down on Friday for personal reasons.
"This date gives parties sufficient time to prepare, while allowing the process to move ahead," Mr Key said today.
The date was confirmed following discussions with the Electoral Commission, Mr Key's office said.