"Thu, 22 Jan 1970 04:42:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700122
Only TIME
04:42:52
General datetime
1970-01-22 04:42:52Z
For Database
1970-01-22 04:42:52
For HTTP1.1
Thu, 22 Jan 1970 04:42:52 GMT