Conversation so far:
when does the daylight time change in us
Daylight Saving Time started on Mar 8, 2020 at 2 am.
when does the practice of daylight saving time end in 2020
Daylight Saving Time ends on November 1, 2020 at 2 am.
how did the system of daylight saving time come into place
The Standard Time Act of 1918 was the first United States federal law implementing Standard time and Daylight saving time in the United States.

Question: what is the reasoning
Self-contained rewrite: what is the reasoning for daylight saving time