Meteor shower calendars
A list of dates is not a calendar you can act on. These pages rank each year's twelve peaks by the one factor that is genuinely knowable in advance — how much of the Moon is lit at the peak instant — and let you hide the ones that are not worth the sleep.
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2026
4 of the twelve peaks fall under a Moon less than a quarter lit. The darkest is the Perseids on 13 August 2026, with the Moon 0% lit.
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2027
4 of the twelve peaks fall under a Moon less than a quarter lit. The darkest is the eta-Aquariids on 6 May 2027, with the Moon 0% lit.
What the ranking is and is not
Moon illumination is used because it is the only one of the four factors that can be computed years ahead. Cloud cover cannot: numerical weather forecasts are useful inside about three days and steadily less so beyond that. Radiant altitude depends on where you are standing, so it belongs on the page for your location rather than on a global calendar. Sky brightness depends on where you go, and the measured data for it is not connected yet.
So: use the calendar to decide which nights to keep free, and use the front page on the night itself to decide whether to actually go outside.