"Sat, 15 Jun 2024 14:38:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
14:38:00
General datetime
2024-06-15 14:38:00Z
For Database
2024-06-15 14:38:00
For HTTP1.1
Sat, 15 Jun 2024 14:38:00 GMT