Do wish tokens carry over?

Not really the correct wording on the title but have they said anything about making up wishes for the current activity?

In other words: If I do not earn my token this week, can I earn two next week?

I feel like the typical answer is yes and is what I am hoping for. But, if by some chance they made a statement saying they have to be earned the week they are offered I want to make sure to get in there and finish it out.

Thanks,