Answer:
   
   Pretty much all times of the daylight hours and part of the evening.
   The morning Tamid (perpetual) offering was performed at or close to
   sunrise every day. The evening Tamid was right before sunset. The
   daily minchah (gift) flour offering was in the early afternoon. On
   holidays there were also mussaf (additional offerings). In between
   were voluntary offerings and various kinds of sin offerings, offerings
   after birth or certain other lifecycle events. After sunset, anything
   remaining from the day's services were offered.

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