Adding system time down to millisecond?

I am currently working on an experiment in which I need to record the exact time of stimulus presentation and participants’ responses. I understand that PsychoPy records date and time in the csv result file (with the following format: 2018_Feb_01_1243). Is it possible to have the time (12.43) be more specific down to millisecond? I’m using PsychoPy v1.85.4 on windows 7