Reddit Exact Timestamps by LTP

This extension has one purpose: to replace Reddit's relative timestamps ("1m ago", "4 days ago") with exact dates and times.

Reddit renders every post and comment timestamp as a <time> element that already carries the exact time in its datetime attribute, but displays only a rounded relative string. The extension reads that attribute and rewrites the visible text to the precise date and time, formatted according to the user's preferences.

The toolbar popup exists solely to configure how that timestamp is formatted: which parts to show (date, year, weekday, time, seconds, time zone name), whether to use a words, ISO, or Unix format, which time zone and language to render in, whether to keep the original relative text alongside it, and what to show on hover.