四日 is よっか and 八日 is ようか but their mnemonics are the same (yogurt car). This makes it a bit more difficult to remember which has which reading since recalling the mnemonic doesn’t differentiate the two, despite them having different correct answers. I seem to remember 四日’s old mnemonic being about a yolk car instead? I thought this was better since it helped emphasize the extended ‘k’ sound versus 八日’s extended ‘o’ sound.
Thanks for bringing up the yolk car mnemonic. I was wondering how to distinguish the two.
Ah, I have a way to remember them. My teacher taught it to us kind of like, saying all ten but in a rap, as I kept doing it I got faster and faster, so I can do it pretty fast and recall them all. Just keep repeating it aloud and find a tempo to do it to. Or here is a mnemonic
Imagine two different people calling out to a car in like a boston accent
And the second one is kind of drunk so it sounds longer but car is still in the accent
I too have a way to remember, until it becomes automatic.
4 days is shorter than 8 days: よっ is “short” than よう.
This help me to differentiate the word when I learnt them.
This is excellent feedback and I hope the WK team takes notice of it. In the meantime, a mnemonic I can suggest for ８日 is ようかん. It’s a Japanese sweet and quite delicious. Basically just red bean paste all mashed up and formed into a block. There’s lots of regional flavours and varieties of it. So, imagine eating only ようか(ん) for 8 days!
Not actually a mnemonic, but that is how I remember it:
The native names for 8 and 4 are や(つ) and よっ(つ);
八日 was in old times やうか at some point; then a sound change ~au -> ~ou happened for a lot of words and gives the current ようか
Knowing that intermediate form helps me make sense between よっか (from よっ(つ)+か) and ようか (や(つ)+か trough an old historical form (古形) 「やうか」), as I can link to よ= 4 and や = 8 logic.