JavaScript date + 1 month = 9 months previous

Posted by philnash on Monday January 12, 2026 @06:34AM
from the philna.sh dept.

https://philna.sh/blog/2026/01/11/javascript-date-calculation/

( 1 comment | on HN )

Re:JavaScript date + 1 month = 9 months previous by philnash on Monday January 12, 2026 @06:34AM (#46587047)

Ah, time zones. This is a real thing that happened to me so I wanted to share so that no one else ever finds out their date calculations are off by 9 months.

[ Parent | on HN ]