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TLS Certificate Lifetimes Will Officially Reduce to 47 Days
(www.digicert.com)
This is a most excellent place for technology news and articles.
Or just "1.5 months".
If it was 46 days, there will (arguably) be times where it's less than 1.5 months.
I guess the intention is automation that updates every month, leaving you with half a month to fix issues.