Things that I remember from my childhood are:
Always having a bath on a Sunday evening and getting into pyjamas. Then mum would make a pot of tea and a big plate of buttered toast and we'd all sit around having our tea and toast before bed and school the next day.
Once a month, after payday my dad would take us children out on a Saturday morning for a milkshake at a local café. Looking back he was just giving my mum a break for an hour or two but I can still remember the glasses the milkshake came in and the curly straws.
There are traditions I have started with my DDs that they now ask for along a similar vein.
Saturdays are always pizza and popcorn night. We take it in turns each week to choose a film and eat in front of the TV. We eat all other dinners at the dining table but for pizza and a film, it's eating in the living room.
Sunday afternoons are "spa baths" for DDs and I. That evolved as I take some time out for myself on a Sunday afternoon around 4 or 5pm to have a bubble bath, listen to some music, light a candle then cover myself in body lotion when I get out and get into my pyjamas. Then DDs wanted to get involved so after I have my bath time I call them upstairs and do the same for them. A really bubbly bath, chillout music playing and it's just relaxing time. It also means they are clean and in their PJs early before back to school and work the next day.
On birthdays the birthday person can choose whatever they want for breakfast. This year DD1 chose chocolate chip cookies eaten in bed. Again, something we would never normally do but on birthdays anything goes. They also get to choose whatever birthday cake they wish. I will buy it from a shop if it's possible but sometimes they have an unusual choice and I have to make it e.g. DD2 when she was 3 chose a chocolate button and kiwi cake 🤣.
We also have a lot of traditions around Christmas. I always make a Christmas cake in October half term and everyone in the household has to stir the mixture and make a wish. I take a photo every year of DDs with the mixing bowl and spoon.
We always do a Christmas light safari in the car to drive around looking at the lights in our local town.
We choose a new ornament each year for the the Christmas tree that has some sort of special meaning. Either bought on holiday or has a connection to the year e.g. we got a crown one last year for the Coronation. Or one year we got a very festive dinosaur decoration 🤣 because DD1 was obsessed with them. It does not make for a classy Christmas tree but we love it! I also remember particular random Christmas decorations from the Christmas tree we had as children.