When did Woodstock first appear in the Peanuts Comic?

Up to now I find out 3 answers:

Answer 1:
By gocomics.com and Andrews McMeel
https://www.gocomics.com/peanuts/1964/08/02
https://licensing.andrewsmcmeel.com/features/pe?date=1964-08-02
(Both websites are official, since Andrew McMeel bought UFS in year 2011.) First appears on 2nd August 1964.

Answer 2:
https://peanuts.fandom.com/wiki/Woodstock
https://en.wikipedia.org/wiki/Woodstock_(Peanuts)
First appearance March 4, 1966 (comic strip) (unnamed until June 22, 1970)

Answer 3:
snoopy.com
First appearance April 4, 1967
其實呢一點，美國有一部份資深Snoopy fans 一直認定snoopy.com和peanuts.com做事沒有求真。事緣Schulz family 曾經出版一本叫The Snoopy Treasure的書，書內Page 89是提及Woodstock 是1966/03/04 first appearance, 咁他們當Schulz Family 係神咁拜的一派就會認為，snoopy.com在Schulz逝世後做事求其，http://snoopy.com/ 網站為何不fact check咗先。
Which one is correct?
我自己就無乜所謂，反正我心目中，Woodstock 60年代初(比1964年或1966年或1967年更早)已經用不同的姿態進入Snoopy的生活裏了😀