2019-01-22 UTC
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@HeNeArXn ↩️ You can easily go to the blogs of people using http://webmention.io for a long time and see that the mentions on old posts are still there. E.g. here are mentions from a post from 2015: https://webmention.io/api/mentions.jf2?target=http://tantek.com/2015/218/b1/use-timezone-offsets (twitter.com/_/status/1087656069709660161)