That's just 39 days after the 2014-15 campaign ended in defeat at Newcastle United on May 24.
And it is a shorter break than any other Premier League side has ever had since its inception in the 1992/93 season.
The next shortest break came as Sheffield Wednesday had just 41 days off after the end of the 1994/95 season when they were involved in the now defunct Intertoto Cup, a competition West Ham fans know well after winning it under Harry Redknapp.
Despite the short break, a lot has happened at West Ham in that time. The club has parted company with Sam Allardyce and welcomed back former player Slaven Bilic to East London as his replacement.
The Hammers have also brought in goalkeeper Darren Randolph on a free transfer and Spanish midfielder Pedro Obiang from Sampdoria with more additions on the way.
Despite the abridged break to their summer holidays, West Ham's squad returned to Chadwell Heath in good spirits with top scorer Sakho and winger Jarvis feeling positive.
Sakho told West Ham's official website: "I am happy to see all the players and the new players and I'll be happy to start the season."
Meanwhile, playing for a new manager in Bilic could be the fresh start £10.5 million winger Jarvis needs after just 11 appearances under Big Sam last season, mostly as sub.
Jarvis said: "It's always good to meet everyone back here and everyone is all tanned up and talking about their holidays, it's all good fun."
Meanwhile, Sakho has wasted no time at all in setting his targets for next season, confidently declaring that he would like to score 20 goals in the claret and blue after such an emphatic debut season in the Premier League in 2014/15.