backdate

verb
1
to write a date on a document that is earlier than the actual date
تاریخ گذشته نوشتن, تاریخ عقب‌تر ثبت کردن
compare post-date
2
to make something, especially a payment, take effect from an earlier date
تاریخ پیشین دادن, موثر نمودن از تاریخ گذشته, موثر کردن از تاریخ قبلی
Postal workers are getting a 5.2 per cent pay rise, backdated to February.