I planning a surprise trip for my husband's 40th. He is a math geek. I am not. My plan is to tell him in a series of riddles/puzzles that he needs to figure out. We are going to LA to see his favourite singer. Anyway we are going Oct 25/6 (haven't 100% settled on the date) to Oct 30, 2019. So I was thinking a math equation or puzzle or riddle to figure out the dates would work......but need help so please help

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    $\begingroup$ This question isn't on-topic for this site. Puzzle construction requests are off-topic (see this) and questions that request a compilation of puzzles that fit a criteria are also off-topic. It might be better if you ask this question on meta. You could also ask for help in chat! $\endgroup$ – Adam Aug 22 '19 at 20:30
  • $\begingroup$ My bad, I overlooked the fact that you're after a series of puzzles, not just one. $\endgroup$ – Arnaud Mortier Aug 22 '19 at 20:43
  • $\begingroup$ Look at some existing puzzles and copy what you like. $\endgroup$ – Jan Ivan Aug 23 '19 at 7:35