ETA: ninja’ed.
An actual link to the thread would have been nice too.
This is the post in question:
In late July 2022 the Billy_Rubin guy posted his comment. As of that date his immediately previous post (in a different thread) was in early July 2020, 2 years plus a couple weeks earlier. Which might round up to 3 years. As of today, his previous post was 3 years and 4 months ago versus today. which might round down to 3 years.
A lot of the date range conversion code on the web is suspect. When exactly is “yesterday” or “last week”, or “a year ago”? Hard to say with any precision.