MC Meeting means Medicine cat meeting date
Gathering Date just means what day the clans get together for the gathering.
It's going to be changed up soon, due to how long it takes just to get through a single gathering but here's how its going to work soon;
Every odd month (January, March, May, July, September, November) will be Gatherings and every even month( February, April, June, August, October,December) will be Medicine cat meetings.
We post the gatherings in the Fourtree's topic, and the Meetings in the highstone topic