noun
time of receipt; acceptance time
Used in postal and logistics contexts for the time a package or item is officially received or accepted by the post office or carrier.
追跡情報に引受時刻が表示されています。
The time of receipt is shown in the tracking information.
郵便局の引受時刻は午後5時でした。
The acceptance time at the post office was 5 p.m.
受付時刻 is a more general term for reception or counter acceptance time, while 引受時刻 is specifically used in postal/logistics tracking for the time an item is taken into the system.
Compound of 引受 (ひきうけ, 'acceptance, undertaking') and 時刻 (じこく, 'time, moment').