"Sat, 15 Jun 2024 23:21:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
23:21:23
General datetime
2024-06-15 23:21:23Z
For Database
2024-06-15 23:21:23
For HTTP1.1
Sat, 15 Jun 2024 23:21:23 GMT