Moon calendar for cleaning windows: May 2028
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
Sun 14 (Aquarius), Mon 15 (Aquarius), Tue 16 (Aquarius)
With a waning moon in Gemini, Libra or Aquarius, the panes are said to dry without streaks.
Better not
Mon 8, Tue 9, Wed 17, Thu 18, Fri 26, Sat 27, Sun 28
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