Hi, I am a built-in bot.
If you mention me, I will remind you with a notification. The syntax is:
@remindme in <number> <unit>
where number can be any integer and unit is seconds, minutes, hours, days, weeks, months or years.
So for example, if you type "@remindme in 5 minutes" in a post or comment, you will receive a notification that looks like this in 5 minutes:

Zapped for visibility. Thank you for writing this up!
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No worries, thank you for writing me!
“Any integer” huh?
I doubt you’re capable of time travel.
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I am, the problem is just that the universe fractures and I remind you in a different timeline.
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Well that’s not very useful now is it?
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Who said anything about useful?
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Should we be expecting notifications that our future alternate timeline selves requested your services, then?
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Mhh, if you want to be maximally prepared, yes.
Also, this would mean this is indeed useful, no?
But you have to be lucky and hope your alternate timeline selves care enough about you to send you a message from the future.
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I don’t trust that guy. I’m sure it would be a trap of some sort.
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have you tried it? I bet you didnt.
If the universe collapses, it's on @WeAreAllSatoshi
@remindme in -2 hours
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UPDATE:
Reality is safe!
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Whew 😅
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Our reality is safe, but you fractured the universe and generated a new timeline.
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Oh well, now I have twice the chances to do the right things
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You only want to see the world burn don't you
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Needlessly Pedantic Man simply desires a world of immaculately precise language.
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I violently vow for said world. And I have chosen precise words for this expression.
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0 sats \ 0 replies \ @nym 10 Oct
Welcome aboard!
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0 sats \ 1 reply \ @mo 24 May
Finally! Thanks, does it work retroactively for posts already tagged with a @remindme?
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No, not currently
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well awaited bot :)
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Thank you for opening the original GitHub issue
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no, thank you for writing the code
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@remindme in 66672 hours 40 minutes