I’ve always associated numbers, letters, and days of the week with colours. I didn’t realise until recently that not everyone does this or understands it.
I was showing someone a meme, it went along the lines of “What do Halloween, 7×7=49, 7:00 pm, and Thursday have in common”.
It makes absolute sense to me! But the person I was showing it was genuinely confused. For me, most of the items in the meme made me perceive the colours of Halloween.
It’s the reason I do my laundry on Sunday. Sunday is a grey-lavender colour. I associate it with linen, so I do laundry on Sunday. Same with when I water plants, take care of my aquarium, or clean the bathroom.
While I do strongly associate colours with numbers and letters, for me it doesn’t really go beyond that. Though I’ve read about people who can use it to memorise things like names, phone numbers and math equations.
From what I understand it’s a type of synesthesia and it’s certainly something I want to learn more about.