Maybe... Do you mean posts, likes, zaps, etc?  Because I signed up maybe 8months before I really used it.  Had a lot of difficulty about 18mos ago getting into it and my original posts disappeared (I think my first was about watching Demolition Man with my son).  The Nip-05 was on some clients but not others.  I had to watch an nostr:nprofile1qqspnzgrfett3asxcuj0gksje6z2zxzpvgd27uvz58m9vsuqh8zzw6cpzemhxue69uhhyetvv9ujuurjd9kkzmpwdejhgqgjwaehxw309ac82unsd3jhqct89ejhxqg5waehxw309aex2mrp0yhxgctdw4eju6t0rjj54p video on setting it up.

Things have changed a lot since then.  Immense progress has been made to make it easier to get started.  Could that be the case?  OR is there an Npub age/creation date tool?