It depends on your actual situation. If you can go to work at any time now, generally fill in "within days after receiving the employment notice" (it can be 3 days, 7 days, or "the day after receiving the employment notice"). Generally speaking, the shorter the time, the better); If you still need to finish your studies before you can go to work, you should write down the specific time when you can go to work, such as "after the Spring Festival", "after March 1, 20 13".