This is rather odd and surprisingly annoying:
I'm saving g-code from S3D to a network server. I am in +10 TZ during daylight savings (so +11). The modified date/time of the g-code file is 9.5hrs (9hr30min) old.
I have checked the time and timezone on both my machine and the network server. Other programs save files with the correct modified date/time. The issue is repeatable and happens 100% of the time.