Okay, this wasn’t actually a claim of prophesy. But God gave us the Torah, the prophets, the oral law, and a bunch other stuff, and there’s one crazy omission from basically most of it: particulars of modesty. (Minor exception: some discussion of what constitutes “ervah” in the Gemara. Spoiler alert: it doesn’t include a lot of stuff that would be considered inappropriate today. Including — relevant detail — ankles.)
One thing I can assure you of: until the wondrous tome known as Oz V’Hadar was published for the shtetl of Manchester, and went viral, the concept of one’s skirt being “too long to be tznius” didn’t exist.
This from Tamar, about the time her principal knew for sure that God disapproves of exposed ankles.
I was chastised by my Hebrew teacher once because my nails were too long. I’ve been warned that wearing long, to the floor, denim skirts was not tznius because it was fashionable with the goyim.
This story does not come out of a Bais Yaakov high school, but it was from [REDACTED], the “college” closely associated with Bais Yaakov (essentially my school was the feeder school for that college) that featured many of the same teachers/administrators/perspectives.
I was attending a summer course during high school. Dress code specified covering up your legs, but I didn’t want to wear tights/long socks so I wore a long denim skirt, to the floor, and paired it with Chinese slippers (if you don’t remember those, they were cheap plastic slip-ons that provided a bit of coverage for your toes). Hey, nothing was showing.
I like to sit with my legs under me on my chair, so at one point the skirt shifted and you could see my bare ankle *gasp*.
The [female] principal saw me and called me into her office to chastise me.
I said “You know what, you’re right. I violated the dress code and I’m sorry, I should have covered my legs properly.”
She said “No! You should care about covering yourself because Hashem wants it, not because of the dress code!”