Payday; the day wages or salary are paid according to company policy or contract.
今月の給料日は25日です。
This month's payday is the 25th.
給料日だから銀行に行ってお金を下ろした。
Since it was payday, I went to the bank to withdraw money.
給料日が近いので、今月は少し贅沢しようと思っている。
Payday is near, so I'm thinking of treating myself a bit this month.