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I never checked my iPad first to see if I had the calendar so I can't give you a definite response on that but I have a great solution for you to collect up to 26 free boosters every day. Have you ever tried the sugar drop challenge? You can collect up to 13 free boosters every 8 hours. You can read more about it here:
https://care.king.com/en/blog/article/candy-crush-sugar-track-is-here