This achievement
CAN be gained any day of the month, I unlocked mine on 10th March 2021! But only
IF you are playing the
WIN10 version on a PC (Achievement list is 'play anywhere' so they're the same game)!
If you have GAMES PASS ULTIMATE or GAMES PASS FOR PC, the game will be free for you to download.
So, firstly; (assuming you're on a Windows 10 machine)
1- Right-click your time in the bottom right of the screen and click "
adjust time/date".
2- Turn "
set the time automatically" to off and click the "
change" button below.
3- Set the date to the 2nd of the month (I set mine to the 2nd March 2021).
4- Click "
change" and the date element is then done.
You'll now need at least one controller to plug into your PC, I personally wired in two controllers as I prefer not playing on keyboard and mouse.
Get into the game and don't worry about signing into the second account yet. Start your chosen mode either an Ancient hunt or a daily trial on one of the maps. Play the level until you get to the double doors indicating the end of the level and
STOP there!
On the primary account press the

button to bring up the players list and your second controller should be waiting to join by holding in the

. Once they're in go through the door to finish the level which you should then be credited your first 25% progression.
When you're back to the camp do the same, pressing the

and holding the

on the second controller to get rid of them.
Rinse and repeat across the remaining maps you need and the achievement is yours!
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NOTE:
This method is only tested by myself in local co-op (whilst connected to the internet) with a guest account and NOT on a console. Your results may vary if attempt this a different way.
I would assume playing online would negate the time change and obviously cannot be done on console!------------------
If you leave a thumbs down, leave a comment as to what the problem is, that way I can make any changes if needed! If its a thumbs down because this a PC solution... shame on you!