Sims 4 Custom Calendar Mods: Holidays and Traditions for Every Playstyle
Four holidays a year, a random Pirate Day thrown in once a season, and zero room to play out anything that's truly yours – the default Sims 4 calendar starts feeling pretty cramped, pretty fast. You find yourself wanting something more personal: holidays that match your playstyle, traditions with actual mechanics, a calendar that tells your story instead of whatever EA decided was good enough.
This roundup has everything you need to build the perfect custom calendar: core utility mods to lay the groundwork, ready-made holiday packs from talented creators, hundreds of new traditions to suit every taste – from Japanese festivals and college parties to pet holidays and eco-friendly events – plus extra icons to make the whole thing look sharp. Featured creators include frankk, KawaiiStacie, Kiara, adeepindigo, SonozakiSisters, and other gifted modders, each of whom has brought something genuinely unique to the game.
Let's kick things off with a few small but handy base mods for dialing in your calendar.
More Holiday & Club Icons v1.6 by Natabear
Want your holidays to have a look all their own? More Holiday & Club Icons adds over 720 icons to the game, sorted into categories so finding what you need is a breeze.
Custom Holiday Utility by frankk
This one's a technical mod, but it's a crucial one – without it, a lot of what's in this roundup can behave unpredictably. It tackles the core issues with custom holidays: making sure they show up properly in existing saves, and preventing errors if you ever decide to pull a holiday out of your game. Keep it in your mods folder as a solid foundation for your entire custom calendar.
Surprise Holidays Be Gone! by simmytime
Tired of manually scrubbing Pirate Day and other out-of-nowhere holidays from your calendar every single time? This mod puts an end to that busywork for good – selected surprise holidays simply stop showing up. What's really handy is that each holiday comes in its own separate file, so you can turn off just the ones that drive you nuts and leave everything else untouched.
Custom Holidays & Ready-Made Calendars
More Premade Holidays by adeepindigo
If you want a full calendar without spending hours building every holiday from scratch, this mod is exactly what you're looking for. It adds a set of ready-to-go holidays across all four seasons, complete with pre-built traditions: picnics, egg hunts, a costumed Halloween, and even a dedicated Winter Holiday Eve with decorating and baking.
Premade Komorebi Calendar by SonozakiSisters
An absolute gem for anyone who's head over heels for Mt. Komorebi and Japanese culture. The creator put together a full year's worth of holidays – from Cherry Blossom season and the Tanabata Festival to Pocky Day – and set it as the default so you're not reconfiguring it in every new save. The calendar runs on a 28-day cycle and blends the creator's own traditions with work from other modders. For the full immersive experience, it's recommended to pair it with a few additional mods.
More Holidays by BosseladyTV
Five more holidays to add to the mix – from a vibrant Carnival to a dignified Veterans Day. As with similar mods, these will only show up in new saves.
More Premade Holidays by MSQSIMS
The biggest ready-made holiday collection in this roundup – a whopping 16 new dates covering just about every occasion. The creator plays with all the expansion packs, so some traditions may require specific packs to work; worth checking the description before you install.
Special Holidays by KawaiiStacie
Eight fully fleshed-out holidays plus three replacements for the surprise holidays you'd rather not see – this mod delivers a genuinely thoughtful and varied calendar, ranging from a cozy Family Day and an eco-conscious Green Day to a somber Day of Mourning and a lively summer festival. Every holiday is editable in-game to fit your vision. One thing to keep in mind: this mod conflicts with other premade holiday mods, so it's an either/or situation.
More and Better Holidays by ZelKat13
Every Sims player knows the pain of rebuilding the same holidays from scratch in every new save. This mod fixes that once and for all: the four default holidays get upgraded traditions, and a fresh set of new ones is added, spread across the calendar based on your chosen season length – 7, 14, or 28 days.
Extra Holidays by frankk
From the same creator behind Custom Holiday Utility, this mod brings three carefully crafted holidays: a spooky autumn Spookyfest, a cheerful spring Flower Day, and a summery Simdependence Day. Each comes as its own separate file, so you can pick and choose. They slot neatly into the calendar at any season length, and a special cheat lets you add them to an existing save.
Traditions
Make Hidden Holiday Traditions Selectable by EP1CxEMAN08
EA tucked away a handful of traditions where players couldn't get to them, which is honestly a shame. This mod unlocks nine hidden ones, including free food and drinks, lottery tickets, discount shopping, and even the ability to give out mean-spirited gifts. A great pick for anyone who wants to squeeze every last drop of variety out of their custom holidays.
Caradriel
Modder Caradriel puts together themed sets of custom traditions tailored to all kinds of holidays. Here's a taste of what's already available:
Food & Drink Traditions
Everything revolves around eating and drinking: grill up a grilled cheese, grab a drink – anything from tea to plasma for your vampire sims – order from a food court, or bake and devour a fresh cupcake.
Writing Traditions
A set built for creative sims: write in a personal journal, send a love letter, work on a book, or simply level up the writing skill.
Children's Traditions
A dedicated set just for kids: play space explorer, hit the monkey bars, run an experiment at the science table, play pirates, or get crafty at the activity table.
Head over to the creator's page – there's a whole collection of sets like these covering every taste and holiday theme you can think of.
Pet Themed Holiday Traditions by icemunmun
An entire holiday dedicated to your beloved pets – why not? Pet Themed Holiday Traditions adds 9 traditions for cat and dog owners: take the dog for a walk, play with the laser pointer for your cat, cook a homemade meal for your pet, throw them a birthday party, or even head to the shelter to adopt a new furry family member. Every tradition comes with its own icon and takes pet personality traits into account.
The Daily Plumbob
Another creator who's taken custom traditions seriously – and covered a seriously impressive range of themes. Here's what's already in the collection:
Crafting Traditions
A full 8 options for creative sims: knitting, woodworking, candle making, flower arranging, juice crafting, and more. Perfect for a makers' holiday or a themed festival.
Eco Traditions
For the environmentally conscious sim: clean up trash on Sulani's islands, go beachcombing, install eco-upgrades on appliances, and vote on community policies.
Occult Traditions
Arguably the richest section of the bunch – separate traditions for each creature type: vampires use their powers or drink blood, ghosts spook the neighbors and possess objects, spellcasters duel and brew potions, mermaids show off their ocean abilities, and paranormal enthusiasts hold a séance.
Student Traditions
Three traditions that capture the spirit of university life: debates, juice pong, and a keg stand – everything you'd expect from a proper college party
The creator's page also has traditions for leisure and winter sports – definitely worth a browse to see the full list!
Holiday Traditions by adeepindigo
Adeepindigo also offers standalone custom traditions, each with a unique mechanic you simply won't find in the base game.
Sports Pool
Sims can place a bet on a sports tournament via phone or computer for §25 – and then either take home 70% of the pot, walk away with a consolation 30%, get their entry fee back, or come up empty-handed. The creator recommends pairing it with a sports TV tradition and some drinks for a full-on themed sports fan holiday.
Valentine's Day
Arguably the most fleshed-out tradition in the whole roundup. Sims can send valentines by mail or computer, ask someone to be their Valentine, and receive letters from secret admirers – all with moodlets, relationship point gains, and even the possibility of getting turned down. Kids can join in too, adjusted for friendship level rather than romance.
Voting
Sims head straight to the polling place right from their phone, look into the candidates, cast their vote for one of the parties, and follow the election results on TV or through the news. You can even campaign and try to sway other sims.
Holiday Traditions for Cottage Living by Nephable
A whopping 40 custom traditions built specifically around Cottage Living – nothing else in this roundup comes close. Every single one is rooted in rural life: harvesting crops, working with animals, cooking up country dishes, crafting with wool, and much more. Each tradition has its own unique icon and description, and the creator warns upfront that the descriptions are packed with puns – which makes reading through them a treat in itself. You can download all 40 in one file or cherry-pick just the ones you want individually.
Kiara
Kiara is the undisputed record-holder when it comes to custom traditions: the creator's catalogue runs into the dozens, and every single one is available as a separate download. The range of themes is genuinely impressive – from cozy everyday moments (have a coffee, take a bath, read a book, make a candle) to outdoor adventures (hiking, fishing, ice skating, swimming, cycling), romantic milestones (propose, host a family dinner, hug a parent), and downright unexpected activities like visiting a cemetery or blasting off into space. With a lineup like this, you can mix and match traditions for literally any holiday you can dream up.
