Puzzle questions at the job fair with a monthly salary of 30,000 yuan

I agree with the person above that it is September 1st

The analysis is as follows:

(1) Xiao Ming said: If I don’t know, Xiaoqiang definitely doesn’t either Know.

Please note that the month is not June or December which has special days 7 and 2, because if it is one of June and December, even if Xiao Ming doesn’t say it, as long as Xiaoqiang’s day is 7 or 2, Xiaoqiang also knows what month it is, so Xiao Ming's words are invalid, so it must not be June or December.

(2) Xiaoqiang said: I didn’t know it at first, but now I know it.

The remaining months of March and September, with the repeated 5th, are definitely not the answer. So now there are still March 4, 8 and September 1. Xiaoqiang knows the answer, but at this time, we cannot analyze which date it is.

(3) Xiao Ming said: Oh, then I also know.

According to Xiao Ming’s answer, we can know that the answer is September 1st. Because, if the month Xiao Ming knows is March, he cannot know the answer. After all, there are two days to choose from in March. Since the conditions say that he knows the answer, then we can analyze that the month he knows is September

Therefore, the answer is September 1st