"Thu, 29 Jan 1970 19:42:27"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
19:42:27
General datetime
1970-01-29 19:42:27Z
For Database
1970-01-29 19:42:27
For HTTP1.1
Thu, 29 Jan 1970 19:42:27 GMT