A crowd calendar gives every day of the year a score out of 100, and the way to use it is simple: open the calendar for your park, look only at the days you could actually go, and pick the lowest number that fits your hours. The score is about queues on that park's main rides, and the word beside it tells you whether that is normal for the park.
Every park has one on the crowd calendars page. The examples below come from the Alton Towers calendar and the Magic Kingdom calendar, read in September 2026.
What the percentage means
The number on each day is how full the park is expected to be, on a 0 to 100 scale. The site describes it as how long the queues run on the park's main rides in the middle of the day, and gives rough equivalents: 50% is about a 17 minute queue, 70% about half an hour, 90% about an hour. Where a park sells dated tickets, the share of its capacity sold is used instead if that is higher.
The top of the scale is anchored to the park itself. The Almanac page, which describes the forecasting model, says every day is scored on a scale where 100 means the park's own busiest day. A 90 at a small regional park is that park at its peak, not a claim that it is as crowded as Magic Kingdom on its worst day, and it is not a percentile of all parks. To set two parks against each other, use the compare tool.
Beside the number sits a word, from Quietest to Busiest, which compares the day with that park's own history. As the calendar page puts it, a small park can be at its busiest on a day that is still short queues. Past days are measurements, not forecasts: once a day is over, the site scores its prediction against what the queues actually did and shows the recorded figure. Future days carry an asterisk and an Est. label on their queue estimate.
The colour bands
The calendar colours each day from cyan at the quiet end through green, amber and orange to red at the busy end. The five colours match the five words:
| Colour | Word | What the site says it means |
|---|---|---|
| Cyan | Quietest | Among the quietest days at this park |
| Green | Quieter | Quieter than a normal day here |
| Amber | Typical | A normal day for this park |
| Orange | Busier | Busier than a normal day here |
| Red | Busiest | Among the busiest days at this park |
The band is relative to the park, so read colour and number together. At Alton Towers in September 2026 a 50% day is labelled Quieter. At Magic Kingdom the same month, 62% is Quieter and the month averages 61%, so a figure that would be a busy day at a small UK park is an ordinary one in Orlando. The number tells you roughly how long you will stand in line; the colour tells you whether the park will feel busy for the park.
Why weekends and school holidays sit high
Weekends are the busiest days at nearly every park the site tracks. The best time to visit page puts Saturday at the peak with Sunday close behind, and Tuesday and Wednesday as the quietest, with midweek waits roughly 25 to 40% shorter than a Saturday at the same park.
School holidays lift whole weeks rather than single days. The calendar overlays a school holiday badge for the regions it has dates for, at the time of writing England, Scotland, Germany and the three French school zones. Tap a badged day and it names the region and the break. Some of the 2026 windows it uses:
- England: summer 22 July to 31 August, October half-term 26 to 30 October.
- Scotland: summer 3 July to 14 August, so a badge can appear at an English park before the English holiday starts.
- France: staggered by zone. Zone C, which is Paris, has its spring break 4 to 20 April 2026, Zone A 18 April to 4 May.
Anywhere else, including the United States, there is no badge and you need to check local school dates yourself, though the model still learns holiday demand from the park's own history.
The other reliable lift is an event. Scarefest at Alton Towers runs 26 September to 1 November 2026 on 25 selected dates, as published by the park, and the first Scarefest weekend is forecast at 75% and 70% with the park open until 9pm. Magic Kingdom's calendar lists Mickey's Not-So-Scary Halloween Party on 38 selected nights as a separate ticket evening event, and shows the park closing at 6pm on a run of September days rather than 10pm or 11pm.
How far out to trust it
The forecast runs 9 months ahead, so the Alton Towers calendar read in September 2026 already had figures through May 2027. A number that far out is a seasonal estimate built from the day of the week, the school calendar and what that time of year did before. It does not yet know the weather, because the model only nudges near-term forecasts with the weather forecast, and it cannot know about an event the park has not announced.
As the date approaches the forecast sharpens. Calendars are recalibrated weekly against what actually happened, and the Almanac page publishes accuracy at six weeks out: 87.3% across more than 80 parks for edition 1.2, measured only on days the model was never trained on. Per-park figures vary, from 70.9% at Legoland Windsor to 88.9% at Paultons Park, with Alton Towers at 86.5%.
So use the far-out calendar to pick a week, then come back in the last few weeks to pick the day. A 31% against a 34% five months out is not a real difference.
Comparing two candidate dates
Open the month, ignore any day you cannot make, then check three things for each day left:
- The number and the word. Lower wins, and a lower band is a clear win.
- The published opening hours. A busier day with more hours open can still give you more rides.
- The events list under the calendar. An event night explains a high number, and if you want the event, the number is the price of admission.
A real pair from the Alton Towers calendar, read on 11 September 2026:
| Date | Forecast | Band | Est. queues | Hours as published |
|---|---|---|---|---|
| Wednesday 16 September | 32% | Quietest | about 10 minutes | 10am to 4pm |
| Saturday 19 September | 70% | Busier | about 30 minutes | 10am to 6pm |
The Saturday is open two hours longer, but the queues are forecast at three times the length. Six hours at 10 minute queues gets you far more rides than eight hours at 30 minute queues, so the Wednesday wins. Extra hours rarely make up for a jump of two bands. The Alton Towers best time page does this sifting for you, and the opening hours page shows every day's hours in one place.
When two dates tie
Ties are common in a quiet month. In the same calendar, Tuesday 15, Wednesday 16 and Thursday 17 September were forecast at 33%, 32% and 33%, all Quietest, all 10am to 4pm. A single point is inside the forecast's margin, so treat them as level and break the tie on:
- Park hours. If one day is open longer at the same crowd level, it is the better day. Here all three matched.
- Events. None of the three fell inside Scarefest. Where one candidate is an event night and the other is not, that decides it unless the event is the point of the trip.
- Weather. The calendar shows a forecast icon and temperature for the next few days only. Inside that window a dry day beats a wet one; beyond it, wait if you can.
- Ride reliability. The reliability page shows how much of opening hours each ride actually ran over the last 60 operating days: not which day a ride will be down, but which rides to expect trouble from.
At some parks the tie-break matters more than the day of the week. The Magic Kingdom calendar for September 2026 says weekend and weekday crowd levels are fairly similar that month, so arriving early matters more than the day. The month runs from 43% to 71% while the published closing times swing between 6pm and 11pm, so the hours column is the one to read.
What the calendar cannot tell you
The score is a forecast of crowds across the park's main rides, not a promise about any single ride and not a live reading. Outside what it can see:
- A ride breakdown. Alton Towers' 40 tracked rides ran 79.6% of opening hours over the 60 operating days to 10 September 2026, and the calendar cannot say which day the headline coaster will be down. The park's live page shows what is happening now, and Park Queue Times Plus queue alerts can tell you the moment a queue drops.
- A surprise school trip or coach party. The model captures patterns that repeat, not a single coach that arrives on a Wednesday in March.
- Ticket prices or whether a date has sold out. The site shows what it records and forecasts, not what the park is selling.
The line under every calendar says it best: crowd levels are modelled and may not always be right. Use the calendar to pick the day, the park page to plan the morning, and the live times once you are through the gate.
Questions people ask
Is 50% a busy day?
It depends on the park, which is what the word beside the number is for. At Alton Towers in September 2026 a 50% day is labelled Quieter, and at Magic Kingdom 62% still counts as Quieter. Read the number for queue length and the band for whether that is normal for the park.
Can I compare the percentage between two parks?
Not directly, because 100 is anchored to each park's own busiest day. A 70 at a small park and a 70 at Magic Kingdom are both busy for the park, but the queues behind them differ. Use the compare tool to see two parks' typical queues in the same units.
How accurate is the forecast?
The Almanac page publishes it: edition 1.2 scored 87.3% accurate six weeks out across more than 80 parks, measured on days the model had never seen. A date checked close to the visit is better than one checked months earlier.
Why has my date's number changed since I booked?
Because the forecast is refreshed every week against what actually happened, and near-term days also move with the weather forecast. A change of a few points is normal. A large jump is worth a second look at the calendar page, where a newly published event or changed hours will show on the day; the FAQ explains where the numbers come from.