A calendar that knows what the moon is doing.

The sky keeps a precise schedule. Phases turn on the day, the moon rises and sets to the minute, the tide follows the moon, and the year's best meteor showers land on dates you could have circled months ago. None of it is a surprise — to the sky. You just tend to hear about it afterward, from someone who was already outside.

Lunaday's whole job is to move that schedule forward in time — out of the almanac and the astronomy sites, and into the place your own schedule already lives. The darkest nights, the ones worth driving for, stop sneaking past.

Lunaday is built for stargazers first — the dark-sky calendar is the heart of it — but the tide table earns it a place with fishers, surfers, and anyone who lives by the water. Photographers get moonrise times worth setting an alarm for. Gardeners get the traditional almanac layer, kept clearly to one side and labeled as tradition, not science. And it knows the old names: it can tell you the Wolf Moon from the Sturgeon Moon, the Harvest Moon from the Snow.

Lunaday is free, and free is genuinely useful: the phase for any day, moonrise and moonset, sun times, and today's tide at your nearest station. A one-time Lunaday+ purchase — $9.99, yours forever, no subscription — opens up the parts you'll plan around.

Privacy here is architecture, not a promise. The astronomy — every phase, rise, set, and dark-sky window — is computed on your iPhone, offline, by a Swift port of the well-known SunCalc algorithms. Lunaday reaches the network at exactly three keyless endpoints, and none of them carries anything about you: NOAA tide stations, NOAA weather buoys for swell, and Apple geocoding to turn a place into a name. No account, no analytics, no tracking, no ads. The privacy policy is short enough to actually read.