any day

any day

No set or specific time or date; any time. I don't need the report back immediately, any day will do.
See also: any

any day

1. No particular time, as in It doesn't matter when; any day is fine with me.
2. Also, any day now. Quite soon, as in I might get a call any day, or There could be a snowstorm any day now.
3. Also, any day of the week. Every day, as in I could eat fresh corn any day of the week. All three senses employ any in the sense of "no matter which," a usage dating from a.d. 1000.
See also: any
References in classic literature ?
They had done this so often in the canning establishments that the girls were fairly desperate; their wages had gone down by a full third in the past two years, and a storm of discontent was brewing that was likely to break any day.
Three one-day workshops were offered in Roanoke, Wintergreen, and McLean, Virginia, targeting counselors and program staff from any day camp in Virginia, licensed or unlicensed, accredited or non-accredited.