How do you beat 10 days in GTA 5?

How do you beat 10 days in GTA 5? MISSION NOTE: SAVING TIME To progress the time faster, use the SAVE function at the Safehouse but do NOT save the game (press the Circle/B button to leave the Save menu)! This will advance the time by 6 hours faster each time without the need to actually save. In total, Save the game 40 times to reach ten days.

MISSION NOTE: SAVING TIME

To progress the time faster, use the SAVE function at the Safehouse but do NOT save the game (press the Circle/B button to leave the Save menu)! This will advance the time by 6 hours faster each time without the need to actually save. In total, Save the game 40 times to reach ten days.