HTTP Cache-Control and Expires

• Cache-Control override Expires

  • Ref: RFC 9111

• Cache-Control supersedes Expires

• Cache-Control offers more flexibility and options than Expires

• Cache-Control use relative amount of time (seconds)

  Cache-Control: max-age=3600

• Expires use date format

  Expires: Thu, 01 Dec 1994 16:00:00 GMT