noun
post-dating; dating forward
Refers to writing a future date on a document, check, or letter instead of the current date. Common in business and legal contexts.
契約書に先日付でサインを求められた。
I was asked to sign the contract with a future date.
先日付の小切手は銀行で換金できない。
A post-dated check cannot be cashed at the bank.
Compound of 先 (saki, 'ahead, future') and 日付 (hizuke, 'date'). The reading さきひづけ reflects rendaku on 日付.