Happy 24th Birthday #Pidgin instant messenger. Although not in Wikipedia (yet?) the actual birthday of then #Gaim was November 18th 1998 as @grimmy (today's lead dev) researched some months ago.

If you like stickers, check out the birthday pack Grim put together for the occasion:
https://shop.reaperworld.com/collections/frontpage/products/pidgin-birthday-pack