Find your shared window
Fart Together Co-op Session Planner
Enter one availability window for each of 2–4 players. The planner converts their local times, finds the overlap and checks whether your requested session fits.
Get the crew together
Runs in your browserSaving is optional. Loading replaces the form; it never runs automatically. Only the current plan is kept.
How to use the Fart Together co-op planner
- Choose 2, 3 or 4 players and your desired session length in whole minutes.
- For each active player, select their time zone and enter the local start and end date and time when they can play.
- For an overnight window, use the following calendar date for its end. An end time earlier on the same date is not automatically treated as tomorrow.
- Calculate the overlap. Check the result in every player’s local time, then copy it if you want to share it.
- If you want to return later in this browser, explicitly save the plan. Use Load saved plan to restore it or Delete saved plan to remove the saved record.
JavaScript is needed for calculation. Inputs stay in your browser, and the tool does not require names, email addresses or a Steam login. See Privacy for the storage and clipboard details.
What the result means
Ready means the common window is at least as long as your requested session. Too short means there is some overlap, but it is shorter than you asked for. No overlap means there is no positive-length period when every active player is available.
The tool finds a common window; it does not choose who should stay up late, reserve a lobby or send an invitation. It also does not include installation time. Ask everyone to complete the multiplayer preparation checklist beforehand, or include extra time in your requested window.
The calculation and its assumptions
Each local date and time is converted to an absolute instant using its selected IANA time zone. The shared start is the latest player start. The shared end is the earliest player end.
Common minutes = max(0, shared end − shared start), measured in minutes.
A requested session fits when common minutes are greater than or equal to the desired minutes. If one player is available only until exactly the moment another begins, that creates zero common minutes.
The planner compares one continuous window per player. It does not solve recurring schedules, multiple separate windows, breaks, attendance preferences or a best-time poll. All active players must be present for the same interval. Deactivated player slots do not participate in the calculation.
Worked example
This is an illustration, not a suggested play appointment:
| Player | Time zone | Local availability |
|---|---|---|
| Player 1 | America/New_York | October 22, 2026, 18:00–21:00 |
| Player 2 | Europe/London | October 22, 2026, 23:00 to October 23, 2026, 01:00 |
For those dates, both windows include 22:00–00:00 UTC, a two-hour overlap. A 90-minute request fits. The same local hours on a different date may convert differently because seasonal clock changes occur on different dates in different regions.
Overnight windows and daylight saving
Use city/region time zones such as America/New_York or Europe/London, rather than assuming an abbreviation has one fixed meaning. The calculation uses your browser’s time-zone data; keep the browser and device up to date.
When clocks move forward, some local times do not exist. The planner asks you to choose a different time instead of silently shifting the input. When clocks move backward, a local time can occur twice. If that affects an input boundary, explicitly choose its first or second occurrence so the result is unambiguous.
Supported calendar years are 2000–2100. A player’s single window may be no longer than seven days, and the requested session must be 1–1,440 whole minutes. These are tool limits, not game rules.
Saving, changes and copying
Changing any active input invalidates the old result; recalculate before sharing it. Save stores the inputs and a versioned record locally, not a booking or a current result. Loading still requires a new calculation. Damaged or unsupported saved data produces a message rather than an assumed valid plan.
A copy action is successful only when the browser confirms the clipboard write. If it fails, copy the displayed text manually. Sharing is your choice, and copied schedules may reveal when your group is available.
Session preparation checklist
- Agree which app everyone will open: the free demo or the main game once its availability has been verified.
- Use the official download links and finish updates on each PC.
- Confirm the number of players and how you will communicate.
- Check the date, local time and time zone in the copied plan.
- Leave time to inspect controls and learn the shared raft with the starter guide.
This is an independent scheduling tool built for the game’s documented 2–4 player co-op range. It is not connected to Steam or the game and cannot predict the release unlock time.