<Ul> <Li> Honolulu, Hawaii, United States: UTC − 10; 16: 00 on Monday </Li> <Li> Toronto, Ontario, Canada: UTC − 05; 21: 00 on Monday </Li> </Ul> <Li> Honolulu, Hawaii, United States: UTC − 10; 16: 00 on Monday </Li> <Li> Toronto, Ontario, Canada: UTC − 05; 21: 00 on Monday </Li> <P> The time - zone adjustment for a specific location may vary because of daylight saving time . For example, New Zealand, which is usually UTC + 12, observes a one - hour daylight saving time adjustment during the Southern Hemisphere summer, resulting in a local time of UTC + 13 . </P>

Who came up with the different time zones