ive made a few attempts at correlating a differemt set of stardates with Real Time dates.
first digit: Century
Next two digits: year
next 3 digits, day and time.
for example, Today is Thursday, 20 March 2003, 18:30 GMT.
That would make the date 10321.8 (210321.8, if you prefer)
the 20th of March is the 79th day of the year, multilply by 24, add the hour of the day, and then divide by 8766 (365.25*24)
Of course this is not the stardates being used in the 3 Trek Series (TNG, DS9, VOY) the case of the second number being the season number since the restart 16 years ago. They never followed any other format besides that, they made up the numbers as they felt neccessary and of course, there have been times where the next epsiode, according to the StarDate has actually taken place before the prvious episode.