K-day

day-to-day forces support

day-sight (day sight)

day-to-day issue

organizational maintenance (O-level) (day-to-day work that standard airfield maintenance groups perform in support of airfield operations)

captain of the day

C-day

day of supply (DOS)

D-Day

E-day

G-day

M-day

officer of the day

one day’s supply

order of the day

rig of the day

standard day of supply (SDOS)

daysack, assault sack / pack, patrol / day pack, Northern Ireland (NI) patrol sack

field day

day sight

day/night combat sight

day/night laser sight

day/night periscopic sight

day/night thermal sight

day-night sight

ninety-day wonder

We've made it through another day. - Well, damn it anyway!

all-day parking

day / night effect

day consumption of fuel

day march

day tracer

day's march