"Sun, 11 Jan 1970 23:37:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
23:37:45
General datetime
1970-01-11 23:37:45Z
For Database
1970-01-11 23:37:45
For HTTP1.1
Sun, 11 Jan 1970 23:37:45 GMT