Hawaiians divided the year into two seasons – Kau (Summer – when it was dry and hot; beginning in May when Makaliʻi (Pleiades) set at sunrise;) and Hoʻoilo (Winter season when it was rainy and chilly; beginning in October.) Months were measured not by the number of days, but were based on the phases of the moon - each beginning with the appearance of a new moon and lasting until the appearance of the next new moon.
It wasn’t until the Westerners arrived that clocks and watches were used to measure passage of time during the day. In 1883, the US railroad industry divided the continental US into five (later four) time zones, establishing official time zones with a set standard time within each zone. It was not until 1918 that an Act of Congress set standard time all over the US; that act also provided for nationwide daylight saving time from March through October.
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