Throwing a birthday party 3 months early. Weird or no??

So a family in my kids kindergarten class is moving over the summer. Their Childs birthday is in late August but the mom wants to throw their birthday party at the end of May, but also plans to throw the child another birthday party again in August. It’s a long distance move so there’s no possibility anyone from her current school would be able to attend the party in august, but it seems strange to throw a birthday party so far in advance and then also have another party for the same birthday. The mom has also complained about how to move all the gifts since the movers will have already picked everything up and about having to throw a party at the new place because they won’t be completely settled in yet… Is this a normal thing people do now or is this weird??