十斋日 (十齋日) shí zhāirì

shí zhāirì set phrase the ten fasting days of the month
Domain: Buddhism 佛教
Notes: Namely, the 1, 8, 14, 15, 18, 23, 24, 28, 29, and 30th days (FGDB '十齋'; SH '十齋日', p. 54)