# DigiCert — TLS certificate maximum validity by Certificate Authority: what each CA actually issues today

For DigiCert, maximum validity (days) is 199; effective date of current limit is 2026-02-24; next reduction limit (days) is 99; still issuing tls certificates is yes; notes is DigiCert's maxima are one day shorter than the CA/Browser Forum ceiling; the 99-day maximum applies between early 2027 and early 2029, with a 46-day maximum from early 2029, recorded from its source on 2026-08-18.

- **Certificate Authority:** DigiCert _(verified: appears in the quote below)_
- **Maximum validity (days):** 199 _(verified: appears in the quote below)_
- **Effective date of current limit:** 2026-02-24 _(our reading, not quoted from the source)_
- **Next reduction limit (days):** 99 _(verified: appears in the quote below)_
- **Still issuing TLS certificates:** yes _(our reading, not quoted from the source)_
- **Notes:** DigiCert's maxima are one day shorter than the CA/Browser Forum ceiling; the 99-day maximum applies between early 2027 and early 2029, with a 46-day maximum from early 2029. _(our reading, not quoted from the source)_

## What the source says

> Additionally, all public TLS certificates issued on or after February 24, 2026, cannot exceed the new 199-day maximum validity.

## Source

- https://knowledge.digicert.com/alerts/public-tls-certificates-199-day-validity

Last verified: 2026-08-18. Review by: 2026-09-17.
Part of [TLS certificate maximum validity by Certificate Authority: what each CA actually issues today](https://referencesource.org/ca-issuance-validity/).