"Sat, 15 Jun 2024 19:40:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
19:40:15
General datetime
2024-06-15 19:40:15Z
For Database
2024-06-15 19:40:15
For HTTP1.1
Sat, 15 Jun 2024 19:40:15 GMT