How is your calendar of holidays?

I set my seasons to be 3 weeks long (4 felt too long, 2 too short, so I got a mod that let me do 3) and have about 1 holiday per sim week. 13 total holidays over the 12 sim weeks in a year and one of the holidays I don't have tagged as a day off (Polar Plunge Day), so it's about 1 holiday day-off per week. 3 of them also fall on weekends, so it's only 9 days of in the year for school kids.

Winter:
Polar Plunge Day - tradition of Drinking and polar plunge.
Winterfest Eve - Baking, Father Winter, Decorate, Attend Holiday Service, Give Gifts
Winterfest Day - Open Gifts, Holiday Lights, Decorate, Grand Meal, Holiday Spirit
New Years Eve - Resolutions, Decorate, and drinking and partying

Spring:
Valentines Day - all of the romantic traditions plus decorate
Celebration of Song - all of the art, dance and music traditions
Day of Fasting - Fasting, attend holiday service
Easter Sunday - Flower Bunny, Egg Hunt, Decorate, Grand Meal and one other I forget

Summer:
Llama Day (sim equivalent of Independence Day) - Fire Works, Water activities, grilling, campfire
Remembrance Day - whatever the holiday tradition is about remembrance, grilling, campfire

Fall:
Oktoberfest - drinking and party related ones, plus decorate
Spooky Day -- all the spooky ones like trick or treat, costumes, etc. plus decorate
Harvestfest - Grand Meal, Invite Guests, be thankful, watch sports tv and decorate

Right now I'm fine with the ones that came with Seasons, but I'm thinking that I might need to add in an Easter and Halloween type holiday - just haven't figured out when (besides which season). Still getting comfortable with Seasons lol.

I have only added one holiday but it happens every Saturday with work off. Its family day the activities are grand meal which I have them make the grand breakfast, tell stories, play games, invite guests which they invite their extended family over and than the travel off lot which they usually go to the restaurant because that usually fits all the family.

I just revamped my calendar a while ago! I always hated how New Year's Eve was placed... right at the end of Winter, because that's not how it works where I live. New Years is right in the middle of winter, if anything.

So here's my calendar. I'm too lazy to describe where each holiday is exactly, but there're all listed in the order that they appear.

Also, each season on my calendar is 4 weeks long (my sims have custom made lifespans that are pretty long, lol).

Spring:
Spring Break: go on vacation, streaking, and party spirit.
Fools Day (April Fools): mischievous spirit
Egg Day (Easter, lmao): egg hunt, flower bunny, bbq
Spring Cleaning: cleaning, of course, and air grievances

Summer:
Pride: party spirit, attend ceremony (which I pretend is a pride parade), art and music spirit, give flowers
Summer Vacation: this is an ENTIRE WEEK long, with each day having various summer related traditions, like water fun and go on vacation. I also included a custom tradition where gives kids get all week off of school, but not the adults (sorry parents).
Simdependence Day: fireworks, bbq, party spirit

Fall:
Spooky Day (Halloween): spooky spirit, wear costumes, trick or treat
Day of the Dead: remembrance, tell stories, attend ceremony
Harvestfest (Thanksgiving): thankful spirit, grand meal, invite guests, holiday gnomes

Winter:
Winterfest (Christmas): decorate, father winter, open presents, festive lighting, festive spirit
New Years Eve: make resolutions, drink, countdown to midnight
Love Day (Valentines): romantic spirit, go on a date, give flowers

And that's it for now. I might add Winterfest Eve and New Years in there, but eh.

On another note, the surprise holidays that the game gives you are... something. Right after my "Day of the Dead" holiday, the game threw in a "Neighborhood Brawl" holiday. Like, "yeah, let's remember the dead then try and kill each other!" :#

I have the GOD holiday. Good Old Days.
It's to celebrate my legacy and the sims passed in it. It's about telling stories, that party spirit, ghosts, to see the dead relatives and something else lol. It's the first day of the second spring week. I love spring in real life. I wanted it to be nice and sunny out but not summer.
And the SSHD. School Summer Holiday. only celebrate it if I have kids. It's water fun and playing games.

I recently updated my calendar with what I think will be my definitive schedule for the holidays. My seasons each last 2 weeks.

Spring:
Easter-Sunday in week 1 of spring. Attend holiday ceremony, flower bunny, egg hunt, baking. Spring decorations.
Mother's Day-Sunday in week 2 of spring. Gift gifts, thankful spirit, give flowers.
Love Day-Thursday in week 2 of spring. Romantic spirit, go on a date, give flowers, romantic TV. Love Day decorations.

Summer:
Independence Day/4th of July-Thursday in week 1 of summer. BBQ, fireworks, water fun, invite guests, party spirit.
Father's Day-Sunday in week 2 of summer. Give gifts, thankful spirit, games.
Since the kids and teens don't automatically get summer breaks, in a technical sense, everyday minus the weekends are a 'holiday' since that's the only way for them to have a true summer vacation. Most of the days have no traditions since that would make it feel more like an actual holiday when all I want is a break from school for them, but there are some days with 1 tradition like cleaning (since I know the lack of school/work would probably result in messes all over the house) or tell stories (my idea of the family just sitting and chatting about what they did over vacation).

Autumn:
Thanksgiving-Thursday in week 2 of autumn. Attend holiday ceremony, thankful spirit, grand meal, decorate, sports TV. Harvestfest decorations.

Winter:
Christmas Eve-Wednesday in week 2 of winter. Decorate, father winter, festive spirit. Winterfest Decorations.
Christmas-Thursday in week 2 of winter. Attend holiday ceremony, grand meal, give gifts, open presents, festive lighting.
New Years Eve-Saturday in week 2 of winter. Countdown to midnight, make resolutions, decorate , party spirit, fireworks. New Years Eve decorations.
Just like with summer, I created a winter break. It occurs on the 2nd week of winter utilizing the non-holiday, non-weekend days and none of those days have traditions since I already have 3 actual holidays in this season.

I think this works well. At first I thought it was odd with autumn only having one holiday, but since the surrounding seasons each have breaks, I think it works balances itself out. I don't have any new, wacky holidays, but I'm fine with that honestly.

I have the holidays that came with Seasons with the addition of these two:
Spooky Day - Trick or treat, costumes, spooky and mischief spirit, you get the idea
Save Anniversary - A day in summer that is the anniversary of when Seasons was installed in that save; thankful spirit, telling stories