You can export Muslim Calendar Dates (the date on which the first of each Muslim month starts) to an MS-Excel file from the Calendars and Dates tab of the Muslim Data Manager, by clicking on the Export button at the top left of that dialog.

The export options are :
Date Range |
Use the Start Year and End Year spinners to specify the range of Muslim years to export. |
Output |
Lets you specify the output file name, and whether it should be opened automatically at the end of the exportation. The option to Overwrite existing file is true by default. |
Note that years selected for export are Muslim (Hijri) years whose year 1421 corresponds approximately to the Gregorian year 2000. A small label below each spinner shows you the Gregorian dates corresponding to the range of Hijri years selected.
See also: Exporting Muslim Prayer Times.