Moon calendar for cleaning windows: May 2027
The old moon calendars name good days even for cleaning windows. You clean with a waning moon, and preferably on a day when the Moon is in an air sign.
Good days
Wed 26 (Aquarius), Thu 27 (Aquarius)
With a waning moon in Gemini, Libra or Aquarius, the panes are said to dry without streaks.
Better not
Sat 1, Sun 2, Mon 10, Tue 11, Tue 18, Wed 19, Thu 20, Fri 28, Sat 29, Sun 30
When the Moon is in a water sign, in Cancer, Scorpio or Pisces, the panes are said to streak more easily.
The Moon's position is computed for every day at noon, Central European Time. The rules are tradition, as the old moon calendars hand them down, not a promise. The whole calendar: moon calendar.
Other months
2026: October · November · December
2027: January · February · March · April · May · June · July · August · September · October · November · December
2028: January · February · March · April · May · June · July · August · September · October · November · December
2029: January · February · March · April · May · June · July · August · September · October · November · December
2030: January · February · March · April · May · June · July · August · September · October · November · December