"Sat, 21 Dec 2024 17:15:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
17:15:09
General datetime
2024-12-21 17:15:09Z
For Database
2024-12-21 17:15:09
For HTTP1.1
Sat, 21 Dec 2024 17:15:09 GMT