I have always loved the Middle Earth Roleplaying System (MERP), and since Dawnforge has no Calendar of its own, have decided to use MERP's. Consider the Month names to be in Common, as opposed to their Elven originals. Enjoy.
The numbered months correspond roughly to the months as they are in North America (i.e. 1 is January, 2 is February, etc.) The local seasonal cycles may vary as much as 6 months, dependent on region, temperate zone, etc. Also note there are no individual days, most chronological entries appearing as Narwain 10, CY 997 (equivalent to Jan 10th, 997).