IPA: /ˈbækˌdeɪt/
KK: /ˈbækˌdeɪt/
To assign an earlier date to something than the date it was actually created or issued.
The accountant decided to backdate the invoice to the previous month.
Past: backdated
Past Participle: backdated
Backdate → It is formed from "back-" (meaning backward or in the past) and "date" (from Latin "data", meaning something given or a specific time). The word "backdate" means to assign a date to something that is earlier than the actual date.
Think of going 'back' in time ('back-') to assign an earlier 'date' — that's what backdate means.