Day of the week for any date feat!

bjoern.gumboldt · April 10, 2021, 3:56pm

Essentially, it’s seven mini memory palaces… I’ve already described it in this post…

Instead of using a journey with 100 loci and placing the numbers 0 - 6 in them, which will become very repetitive very quickly; I use a reverse lookup instead. For this I take all the years that have an offset of 0 (i.e., 00, 06, 17, 23, 28, 34, 45, 51, 56, 62, 73, 79, 84, 90) and put them into a mini-palace that reminds me of Sunday (value=0). Let’s say on Sundays I enjoy time in the garden.

Monday (value=1) I’m back in the office and I place all years that give an offset of 1 (i.e., 01, 07, 12, 18, etc.) there. Just continue the same for the values 2 - 6 with palaces that remind you of Tuesday through Saturday. This is also nice if you are looking for a daily routine to practice your 00−9900-99 system. You’ll have ~15 values each day (that would appear pseudo-random) you can review.

So now if you see April 9, 2070… you got 5 for April plus 9 to get 14, which conveniently has a remainder of 0. Now you look for where you’ve placed 70 and you find it in your Wednesday (value = 3) palace; and there is your answer.