TF2 site easteregg

[UberLemonBoy]

i was looking at the update and i found this
http://www.teamfortress.com/pumpkinpatch/the_last_will_and_testament_of_Zepheniah_Mann/
plz explain i only have TF2 for my xbox

 

[sheic99]

That's last years easter egg. This [http://www.teamfortress.com/screamfortress/family_portrait/] is the one for this years Halloween event.

edit: It's related to the expansive backstory of the universe, you may want to check the wiki,