"Sun, 29 Jun 2025 19:05:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250629
Only TIME
19:05:52
General datetime
2025-06-29 19:05:52Z
For Database
2025-06-29 19:05:52
For HTTP1.1
Sun, 29 Jun 2025 19:05:52 GMT