Calendar Life — a large-scale mod that expands the in-game time, holiday, and family event systems in The Sims 3. It turns an ordinary calendar into an integral part of Sims' lives, allowing them to mark important dates, organize festive meals, invite guests, make toasts, and give real gifts.

The main idea of the mod is to make the passage of time in the game more meaningful and to make family traditions, holidays, and memorable events part of every Sim's everyday life.

🗓️ Calendar and Date System

• The mod adds its own interactive calendar displaying days, seasons, in-game years, birthdays, holidays, and other events. An in-game year consists of four seasons of 30 days each, for a total of 120 in-game days.
• Players can add memorable dates, family holidays, and personal events. When creating an event, they can choose whether it takes place only once or repeats annually.
• The calendar automatically tracks Sims' birthdays. When a baby is born, the date of birth is recorded and the corresponding zodiac sign is determined.
• The calendar supports displaying multiple events on the same day, as well as convenient viewing of holidays and family dates.

🎉 Annual Holidays

• Calendar Life includes its own holidays: Mother's Day, Children's Day, Knowledge Day, New Year's Eve, New Year's Day, Christmas, and Father's Day.
• The standard seasonal holidays from The Sims 3 are also included: Love Day, Leisure Day, Spooky Day, and Snowflake Day.
• Each holiday can have its own traditions, special features, and gameplay interactions. For example, players can organize a festive dinner or give a themed gift during family holidays.

🍽️ Festive Meals

• One of the central features of Calendar Life is a complete system for organizing family lunches and festive dinners.
• Players can prepare the dining table, choose the table setting style, arrange tableware, and plan the festive menu.
• The meal consists of three serving stages: first course, main course, and dessert.
• Dishes are served in sequence. After finishing one course, guests can continue socializing, wait for the next dish, or participate in a festive toast.
• The seating system takes into account the positions of chairs around the table. Table settings are calculated relative to each seating position, allowing different dining table models to be used.
• Separate festive drinks are available for decorating the table, including a wine bottle and a juice carton. These objects can be placed and removed through the table's interaction menu.

🥂 Festive Toasts

• Calendar Life introduces a separate mechanic for making toasts during festive meals.
• After finishing a course, the player can select one of the Sims seated at the table to make a toast.
• The planned visual scene includes the selected Sim giving a speech while holding a glass, the other guests paying attention, and everyone drinking together at the end of the toast.
• Making a toast is optional: players can skip it and proceed directly to the next course. Several toasts can be organized during a single meal, with different Sims taking turns as speakers.

🎁 Real Holiday Gifts

• The mod includes a gift system that allows players to give real objects they have personally selected rather than random items.
• For example, a Sim can purchase a stereo, a toy, or another suitable object, place it in their inventory, and wrap it in a festive gift box.
• On the appropriate holiday, a gift-giving interaction becomes available on the recipient.
• After the gift is given, the box is transferred to the recipient's inventory. The Sim can choose when to unwrap the gift and receive the item inside.
• Holiday interactions depend on the occasion and the recipient. For example, the birthday Sim is congratulated on their birthday, male Sims are celebrated on Father's Day, and female Sims on Mother's Day.

🎄 New Year and Special Traditions

• New Year's celebrations have a separate holiday system featuring gifts placed under the Christmas tree.
• If a Christmas tree is placed on New Year's Eve, personalized gifts for family members, including adults, will appear next to it.
• This mechanic is being developed separately from the regular gift-giving system and is intended to create a special New Year's atmosphere.

👶 Aging and Lifespan

• Calendar Life features an expanded aging system for Sims.
• Players can customize the duration of each life stage in in-game days or use an automatic mode based on a lifespan of 100 in-game years.
• Age will be calculated using a calendar-based formula.

Calendar Life is a mod about time, family traditions, and important moments in Sims' lives. It combines the calendar, holidays, festive meals, and gifts into a unified system in which every in-game year is filled with events, and ordinary family gatherings become true celebrations.

Calendar Life — Installation and Requirements

To use all features, you need The Sims 3 and the Seasons, Generations, Late Night, and World Adventures expansion packs.

1. Original wall calendar — mandatory separate download

MTS Official 2026 Calendar by aisquared, Heaven model:
https://modthesims.info/download.php?t=695392

Extract the author's archive and place MTSTS32026Calendar.package in Documents/Electronic Arts/The Sims 3/Mods/Packages. This file must remain installed. The object is found under Wall Decorations and costs §25. The Calendar Life menu will provide access to the calendar, holidays, family dates, and lifespan settings.

2. Table Settings — Table Setting by Sandy / Around the Sims 3

Use the 2012 Table Setting collection:
https://aroundthesims3.com/objects/roomdining03.shtml

The set contains the tableware needed for table settings. It must be downloaded separately from the creator.

3. Juice carton — Juice_MyFamily by Severinka

Required to place a juice carton on the table:
https://www.thesimsresource.com/downloads/details/category/sims3-objects-furnishing-decor-miscellaneous/id/1109609

4. Christmas tree — for New Year gifts

Use the Holiday Tree from The Sims 3 Store (More Holiday Presents), or one of the separately installed Sandy / Around the Sims 3 trees:
ATS3_object_christmas09_tree.sims3pack
https://aroundthesims3.com/objects/roomseasonal01.shtml
ATS3_object_advent2015_4to3_christmastree.sims3pack
https://aroundthesims3.com/objects/roomseasonal12.shtml

One compatible tree is sufficient. These objects are not included in the Calendar Life archive.

Install .Sims3Pack files through the game launcher. Place the mod files Hestaksa.CalendarLife.package and Hestaksa.CalendarLife.Resources.package in Documents/Electronic Arts/The Sims 3/Mods/Packages.

To use all Calendar Life features, you need The Sims 3 and these expansion packs:

• Seasons — seasons, calendar holidays and New Year presents.
• Generations — gift giving.
• Late Night — glasses and festive toast animations.
• World Adventures — nectar bottles for the holiday table.

Additional downloads for certain features:

What to download
Purpose and location

Table Setting by Sandy / Around the Sims 3
Tableware for place settings. You need the 2012 Table Setting collection: four Plate variants, four Dish variants, casual and formal cutlery and napkins, three kinds of glasses, a bread plate and a placemat — 17 objects in total. https://aroundthesims3.com/objects/roomdining03.shtml?utm_source=chatgpt.com

Juice_MyFamily by Severinka
To place a juice carton on the table. Download from The Sims Resource.
https://www.thesimsresource.com/downloads/details/category/sims3-objects-furnishing-decor-miscellaneous/id/1109609?utm_source=chatgpt.com

Holiday Tree from The Sims 3 Store
Christmas tree for New Year presents to appear. Included in the More Holiday Presents set. (EA Forums — 2649707)

Or one of these two separately installed trees by Sandy / Around the Sims 3:
ATS3objectchristmas09_tree.sims3pack
https://aroundthesims3.com/objects/room_seasonal_01.shtml#gsc.tab=0
ATS3objectadvent20154to3christmastree.sims3pack
https://aroundthesims3.com/objects/room_seasonal_12.shtml#gsc.tab=0
The trees are installed separately through the launcher and are not included in the Calendar Life archive.
Installing any one of them is enough; the other New Year gift conditions remain unchanged.

Wall Calendar
https://modthesims.info/download.php?t=695392&utm_source=chatgpt.com

Install .Sims3Pack files through the game launcher. Both files belonging to the mod — Hestaksa.CalendarLife.package and Hestaksa.CalendarLife.Resources.package — go in Documents\Electronic Arts\The Sims 3\Mods\Packages.

🗓️ Core Calendar Mechanics

Added a custom calendar that displays days and seasons. (Requires a separate download: https://modthesims.info/download.php?t=695392&utm_source=chatgpt.com) The calendar can be found in the Wall Decorations category in Buy Mode and costs §25.

Players can view dates and events for individual days.
Players can add their own events to the calendar.
Each event can be set to occur once or annually.
Annual events repeat in subsequent years.
Events are shown in calendar cells without lengthy text inside the cells.
Multiple events can be scheduled for the same day.
The event list for a single day supports a large number of entries.
Technical ID numbers in square brackets have been removed from the event list.
A new Sim's date of birth is automatically recorded using the current in-game day.
New Sims are automatically assigned a zodiac sign based on their date of birth.

🎉 Holidays

The mod includes its own annual holidays.
Standard seasonal holidays from the game are supported.
Players can create custom holidays.
Each new holiday can be set as a one-time or annual event.

🍽️ Festive Dining

Added the "Table Setting" feature. (Click on a table to open the interaction menu.)
Added the "Set the Table" feature. (Click on a table to open the interaction menu.)
Added dish selection by course: first course, main course, and dessert.
Once a dish has been selected, its corresponding selection button disappears.
Sims can be invited to the table if at least one dish is present.
Inviting Sims to the table does not require additional confirmation.
Players can continue choosing dishes and setting the table before the festive meal begins.
Dishes can be repositioned on the table by clicking them and choosing the appropriate menu command.

🍷 Drinks on the Table

Added a wine bottle as a separate object for the table.
Fixed the menu logic: if there is no wine bottle, only "Place Wine Bottle" is shown.
After the bottle is placed, only "Remove Wine Bottle" is shown.
Added Severinka's juice carton as a separate drink object on the table.
Simplified the menu label to "Place Juice Carton".
After placing the juice carton, only "Remove Juice Carton" is shown.
The juice carton's position is saved.
The juice carton and wine bottle can be moved around the table by clicking them and selecting the appropriate menu command.

🥂 Toasts

Added the "Make a Toast" interaction.
A toast is available between courses, after the current dish has been finished.
Players can skip the toast and proceed directly to the next course.
The speaker is selected from the Sims seated at the table.
The notification for making a toast and choosing the speaker works.

🎁 Gifts

The overall concept of holiday gifts has been approved.
A gift must be a real object chosen by the player, not a randomly selected one.
The player buys an object and places it in a Sim's inventory. The object must have a "Wrap as a Gift" interaction.
After wrapping, the object becomes a gift box, but the actual item remains inside.
On a suitable holiday, an interaction to give a gift appears when clicking a Sim.
After giving the gift, the box is transferred to the recipient.
The recipient can choose "Unwrap Gift".
After unwrapping, the recipient receives the actual object.
New Year is excluded from these mechanics because it has a separate system.

🎄 New Year and Father Frost

A separate system for New Year holiday gifts has already been planned.
Gifts placed under the Christmas tree are handled separately from the regular gift mechanics.
New Year uses its own system and is not mixed with regular gift boxes.

👶 Sim Aging and Lifespan

📅 In-Game Time and Calendar Age

Established that 1 in-game year equals 120 in-game days.
Each season lasts 30 in-game days.
A full in-game year consists of four seasons.
Established the formula for calculating a Sim's age in calendar years.

Age Formula:

Age in years = ⌊In-game days lived / 120⌋

Example: 3,000 days lived / 120 = 25 full years.

⚙️ Lifespan Settings

Two lifespan modes have been approved: automatic and manual.
The default lifespan for automatic mode is 100 in-game years (12,000 days).
Manual mode allows players to enter the number of days for each life stage.
The manual-entry limit is 5,000 days per life stage.

🍼 Sim Life Stages

Seven life stages and their default durations have been approved.

🎂 Birthdays and Calendar Integration

Automatic registration of newly created Sims' dates of birth has been included.
Assignment of zodiac signs based on dates of birth has been included.
A preliminary method for reconstructing existing Sims' dates of birth from their in-game age has been included.

👴 Elderhood and End of Life

Reaching 100 years of age does not automatically mean a Sim must die.
Elder Sims' aging has been configured correctly for the new lifespan settings.
The new lifespan system has been implemented using the game's aging and natural-death mechanics.