Figures you can check, not just read
These pages exist to answer one question each: a table to look something up in, a number to run, a source you can verify. They are updated when the underlying rules or figures change, and each one shows the date its figures were last checked.
Moon phase on any date: illumination, age and the next four phases
Pick a date and the Moon's phase, the fraction of the disc that is lit, its age in days, its distance and the four principal phases that follow, all computed.
Sunrise and sunset for sixteen cities, on any date
Sunrise, sunset, solar noon and day length for sixteen cities on any date, computed from the NOAA solar algorithm and shown in each city's own clock time.
Moonrise and moonset for sixteen cities, on any date
Moonrise and moonset for sixteen cities on any date, including the days with no rise at all — which happens far more often than most tables admit.
Moon phases by month: the four principal instants
New moon, first quarter, full moon and last quarter for every month, dated and timed in UTC — the twelve months ahead, computed rather than copied.
Eclipses 2026–2035: dates, types and where each one is visible
Every solar and lunar eclipse through 2035, from NASA's catalog: date, type, greatest eclipse in UTC, magnitude, duration and the region that sees it.