"Sat, 21 Dec 2024 12:44:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
12:44:09
General datetime
2024-12-21 12:44:09Z
For Database
2024-12-21 12:44:09
For HTTP1.1
Sat, 21 Dec 2024 12:44:09 GMT