"Sat, 15 Jun 2024 18:49:17"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
18:49:17
General datetime
2024-06-15 18:49:17Z
For Database
2024-06-15 18:49:17
For HTTP1.1
Sat, 15 Jun 2024 18:49:17 GMT