You can change it by either overriding the output/friendlytime view, or by hooking into the format, friendly:time hook.
Also, by default if you hover over the timestamp it gives the exact date and time.
And there's already a plugin doing this,
https://community.elgg.org/plugins/869364/1.8.2/elgg-1819-enhanced-friendly-time
@per jensen @bret i really appreciate you!
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