"Thu, 22 Jan 1970 04:42:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700122
Only TIME
04:42:49
General datetime
1970-01-22 04:42:49Z
For Database
1970-01-22 04:42:49
For HTTP1.1
Thu, 22 Jan 1970 04:42:49 GMT