Convert HST to WAT

WAT is 11 hours ahead of HST. HST is UTC−10 and WAT is UTC+1.

Best time to schedule a meeting

Standard 9–5 working hours do not overlap at all between HST and WAT. Someone has to take an early or late call — or use asynchronous communication instead.

HST to WAT conversion table

About HST

Hawaii Standard Time (HST) is UTC−10. It is used in Hawaii, which does not observe daylight saving at all.

Hawaii–Aleutian Standard Time is UTC−10 and Hawaii does not observe daylight saving. That makes it the North American zone whose relationship to everywhere else changes twice a year without it doing anything: Hawaii is two hours behind Los Angeles in winter and three in summer. It is also far enough west that the working day barely overlaps with the US east coast at all.

About WAT

West Africa Time (WAT) is UTC+1. It is used in Nigeria, Cameroon, Angola and much of central and western Africa.

West Africa Time is UTC+1 all year, with no daylight saving anywhere that uses it. It covers Lagos, Kinshasa and Luanda — a very large population on a single fixed offset. It matches Central European Time in winter and falls an hour behind it in summer, which means a standing Europe–Nigeria meeting moves twice a year at the European end and never at the African one.

Does this gap change with the seasons?

Neither HST nor WAT shifts with the seasons, so this 11-hour difference holds all year. That is unusual enough to be worth relying on: most cross-continental gaps move twice a year.

This is the reason scheduling systems store an IANA zone such as Region/City rather than an offset or an abbreviation: the zone knows its own rules and the offset does not.

Frequently asked questions

Other HST conversions

• HST to UTC
• HST to GMT
• HST to EST
• HST to EDT
• HST to CST
• HST to CDT
• HST to MST
• HST to MDT
• HST to PST
• HST to PDT
• HST to AKST
• HST to BRT
• HST to BST
• HST to CET
• HST to CEST
• HST to EET

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