"Sat, 14 Sep 2024 18:48:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240914
Only TIME
18:48:21
General datetime
2024-09-14 18:48:21Z
For Database
2024-09-14 18:48:21
For HTTP1.1
Sat, 14 Sep 2024 18:48:21 GMT