Yes, there is a standard format for month names and numbers. In the Gregorian calendar, which is the most widely used calendar in the world, there are 12 months with the following names and numbers: January - 1, February - 2, March - 3, April - 4, May - 5, June - 6, July - 7, August - 8, September - 9, October - 10, November - 11, December - 12.