Countdown timer not correct

Trying to do a long countdown timer (until the start of 2030, the end of new ICE vehicle sales in UK) which is just over 100 months from now, but the timer is showing 99months ? any thoughts ?

https://calculat.io/en/date/how-many-until/1-january-2030

• This topic was modified 3 years, 7 months ago by shmern.