Time/Dates in SF

Hey all, <br /><br />How do you handle time in your campaigns? SF has time broken down into tendays, 40 of which make a Galactic Standard year. Each day has 20 hours. Other than that, do any of you do anything to mark divisions of time? <br /><br />I guess with each planet having different rotations, seasons are out, but how about months? Of do you use some soft of stardate kind of thing?<br /><br />In Dramune Run - the gullwind has the date 9/15/61 written on the readout. So the 61 FY is obvious, but what about 9/15? This would seem to contradict the system for Time given in the AD rules. <br /><br />Anyways, just curious what everyone else does.