Due to changes in Apple, Mozilla and Google Root Store Policies, as of September 1, 2020, newly issued SSL/TLS certificates with a validity period greater than 13 months (397 days) are prohibited by policy and will not be trusted.
https://www.globalsign.com/en/blog/maximum-ssltls-certificate-validity-now-one-year
https://blog.mozilla.org/security/2020/07/09/reducing-tls-certificate-lifespans-to-398-days/
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