Party Like It's 1997

I imagine, like me, you have your new calendar ready to go up on the wall tomorrow or even an old one if you still have one from 1997, 2003 or 2014 because if the year begins on the same day of the week and is not a leap year, you can use the old calendars from those years and party like it's 1997 again and listen to Aqua's Barbie or Celine Dion warble about how her heart will go on.
In theory you could be a proper tightwad and as long as you don't scribble dentist and doctors appointments all over it, reuse the 2025 calendar in 2031 but at some point we will have to change our calendars because things are happening to our Planet to mess with our timekeeping.
Currently we use a convoluted system of leap years and leap seconds to make sure everything (kinda) lines up as the Earth doesn't circle the Sun in exactly 365.25 days, it is 365.2422 days or 365 days, 5 hours, 48 minutes, and 45 seconds but that changes over time due to things like the spin of the Earth slowing everso slightly each year due to the Moon pulling on our Planet which causes the year to lengthen by 14 microseconds.
With a slightly slower spinning Earth, the length of the days will grow according to scientists and as time goes on we will have to begin reducing the frequency of leap years and within 4 million years we can do without them altogether as the rotation will be exactly 365.00 days but within 21 million years we will have days longer than 24 hours and years more than 365 days but that is a problem for the year 21,000,000 calendarian's to worry about.
Enjoy 2025 or reliving 1997 and watching that Titanic movie again and hearing the Spice Girls.