The Jewish calendar is based on when Adam and Chava (Eve) received their souls. The rabbis analyzed the ages and dates of events mentioned in the Tanach (Jewish Bible) to come up with that figure. A book called Seder Olam Zuta gives the detailed chronology.
[Note: It is currently the year 5771]
2010 is equal to the Jewish year 5770.
The Jewish calendar puts the current year at 5770, counted since creation.
5769 - until the sun goes down on the 18th of September, when it will be 5770.
It was 5769 up until Rosh Hashanah, the Jewish New Year which this year began on the 18th of September in the secular calendar; so, according to the Jewish calendar, it is now 5770.
5770 - just! New Year came at nightfall, Friday 18th September.
5774.
In the year fifty-seven seventy, ...
That would be the Jewish Calendar. Subtract the current civilian year of 2011 from the current Jewish year of 5770 and you get the biblical date from the "creation" of Adam which was 3760 years before the birth of Christ, the second "Adam".
Anything between and inclusive of 1990 to 1999.
It is 5774 (for autumn 2013 until autumn 2014). (the Jewish new year, Rosh Hashanah, falls in September or October, and that's when the year changes).
It means the same thing in Hebrew that it does in English. But if you're asking what the significance of 5773 is to Judaism, it's the new year on the Jewish calendar that begins on Sept 17, 2012. If you're asking how to write 5773 in Hebrew it's תשע״ג
it may varry in the year it was created.