днём

1) General subject: afternoon, broad day, by day, during the day, in the afternoon, in the middle of the day (Reaching for coffee or other caffeinated drinks in the middle of the day may not give you quite the boost you hope it will.)

2) Colloquial: days

3) American: afternoons

4) Makarov: by day (в дневное время суток), during daylight hours (в дневное время суток), in the day time (в дневное время суток), in the day-time, in the daytime