Chatham Island Daylight Time (CHADT)

Chatham Island Daylight Time (CHADT) operates at UTC+13:45 during daylight saving months, typically from late September to early April. Sometimes referred to as "Chatham Summer Time," CHADT shifts clocks forward by one hour from Chatham Island Standard Time (CHAST) to extend daylight hours in the evening for the Chatham Islands, which are part of New Zealand.

Importance and Global Use of CHADT

CHADT is important for adapting to the seasonal daylight needs of the Chatham Islands. By shifting time forward, it supports better use of natural light for daily routines, tourism, and local activities, improving energy use and aligning with community and business operations during the summer months.

Internationally, CHADT helps coordinate schedules for travel, trade, and communication with mainland New Zealand and the broader Pacific region. Its unique UTC+13:45 offset ensures clear time alignment with partners, supporting connections to national and regional networks.

Where and When CHADT is used worldwide