At work, I have to change my password every 90 days, which is just about right in time with the changing seasons. For a daily (or multiple times per day) reminder, make your password a cue to take a deep breath and remember your connection to the season and to nature.
This has the added benefit of helping you remember what your password actually is.
Note: If your IT department sometimes requires your password to access or troubleshoot your computer, choose seasonal, rather than holiday, passwords. Not that I expect my IT department to know what Imbolc is, but it’s still easier to explain SpringFlowers.
Also Note: This is how I come up with the BASIS for my passwords. Obviously most passwords are required to contain special characters and numbers, but there are lots of ways to add those in, once you have a good, rememberable base word.