Free server transfers for event?
No, same thing happened at Halloween.
But there’s guesting… oh wait.
Server transfers are currently free; however, you’re limited to only one server transfer every 7 days.
Henge of Denravi
If your sibling joined the ‘wrong realm’ as their initial server choice upon first downloading/starting the game I think (but am not 100% sure) that they are still entitled to a free server transfer straight away (i.e. they are not tied in to waiting 7 days).
However if your sibling transferred to a current server from a different one whilst you were sleeping then they will have to wait 7 days before they can transfer anywhere else. You could always transfer to them and then in 7 days both of you could transfer elsewhere is you wanted.
Apologies if I am wrong in this, happy to be corrected.
The #GW2Project365 on Twitter
Proudly representing The Legion of Honour [XIII] on Tarnished Coast