Using reference points established in Star Trek: The Next Generation, a mathematical fomula for converting stardates into standard calendar dates is possible. One full Earth year is 1,000 stardate units, so to figure out the date for stardate 41153.7 in the first season (year 2364) take the last three digits and decimal, divide by 1000 and multiple by 365 to get the day of the year, which in this case is 56th day, or February 25, 2364. Don't forget to factor in leap years, in which case the multiplier should be 366.
