Why does the contest use different timezones for each day

I was looking at the rules and noticed

Each Day starts at 12:00:00 a.m. ET and ends at 11:59:59 p.m. PST.

Just seems a bit curious.

Hi Michael,
Thanks for reaching out! This is correct.
The daily challenge opens at 12AM EST. As this challenge has participants in multiple timezones, it remains open until 11:59PM PST, so participants on the west coast are still able to submit within the day and are eligible for the daily prizes.

Best,
Lauren