'What is the maximum max-age for a Squid backend?

What the maximum max-age I can deliver to Squied as a Squid backend, without getting into unsupported?

The original RFC limited max-age to 1 year.

Amazon AWS to 10 years.

Is there a limit for Squid?

The real problem is to preserve objects in the cache forever. So can I set max-age to 100 years or more?

http caching squid

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Solution	Source