https://www.gamespot.com/articles/big-xbox-one-game-sale-starts-soon-heres-when/1100-6460480/

In the market for some new Xbox games? A big sale is coming up soon, it seems. A post on the Xbox website reveals that Microsoft is bringing back its "Ultimate Game Sale" this week. It'll run July 19 through July 30, according to the post. [Update: Major Nelson has shared additional details and formally announced the sale. It will bring discounts of up to 65% on more than 700 games--presumably across Xbox One and Xbox 360--with Xbox Live Gold members able to save an extra 10%. This all begins on July 19 at 12:01 AM PT / 3:01 AM ET / 7:01 AM GMT. PC gamers may also benefit, thanks to Play Anywhere support in certain digital Xbox games.]

Microsoft hasn't actually announced the sale yet, as it was only referenced as part of a sweepstakes event called the "Ultimate Dopplegamer Sweepstakes." As part of this, you can dress up like an Xbox character for a chance to win a trip to PAX West in Seattle.