Ok, fair, but there are alternatives as well. They have little pocket calendars, or you can scribble the date on a piece of paper and keep it in your purse/wallet/under your bed. Even the regular calendar on your phone can be used for this purpose- just put an emoji on the start date, or write a word like "appointment". If you have a pc or laptop there should be a calendar you can use, a word-type document or sticky notes. Or you can write the start dates on the inside of a box of tampons or pads if you use those.

Like... I totally understand the frustration that comes with losing something you're used to, but the world changes whether we like it or not. We have to adapt to the society that we live in, it isn't going to adapt to us. Again, that doesn't mean I think we shouldn't fight for change if we deem it necessary, but it won't benefit you to just be angry at it and lament what was lost