Vidmaster Challenge: 7 on 7

"Let’s dive into this a little deeper and try and address some of the questions that will no doubt arise from the community. First off are the “Vidmaster Challenge” achievements. These three will not earn you any gamer points but there will (eventually) be a pay-off. We’re not going to spoil the fun just yet but suffice it to say that gamerscore isn’t everything. There is a pot of gold at the end of the Vidmaster rainbow and it is something you will want. More details later."

- SketchFactor

Vidmaster Challenge: 7 on 7 is an achievement released with TU2, in which you must to enter a ranked or social playlist with 7 EXP on the 7th day of any month. This means simply to reach 7 EXP in a playlist on the 7th of any month; the achievement will unlock upon the EXP earned reaches 7, should it happen on such a day.

Vidmaster achievements do not give you any gamerscore points, but if you unlock all Vidmaster Challenge achievements, including those that come with Halo 3: ODST, you will unlock the Recon Armor for your personal use.

In order to help gamers achieve this, Bungie creates playlists on the seventh of every month where each player has zero experience in the playlist. Another easy way to attain this achievement is to earn 7 experience in before the seventh of the month, so as to avoid crowds and such on the day. Log in on the seventh, and get it without much hassle. Do this in either a playlist you don't frequent, or stop playing that playlist altogether. It is also possible to enter a double exp weekend play list and quit out (resulting in a -1 to exp) making it easier to get.

Trivia

 * The medal's background picture is the Marathon symbol.
 * The 7 in the medal's name is a 7 reference.