A bilingual pun (explained)

The Chinese words sound like the English words when pronounced with a Chinese accent.
The Chinese meaning is appropriate for any language.

忙Day     "Mang'day"   Busy Day

求死Day  "Chius'day"   Requesting-Death Day

未死Day  "Ways'day"    Haven't-Died-Yet Day

受死Day  "Shows'day"  Accept-Death Day

福來Day  "Fulai'day"    Good Fortune-Comes Day