UPDATE: On receiving a comment by my lovely friend MLD saying that neither she nor her Mamma had heard of this saying before I took to google on Jenny’s insistence that it was a thing….. This is what I found: https://idiomation.wordpress.com/tag/dutchmans-pants/
So – I stand corrected – it’s a thing.
Today I said to Me Jenny in desperation – “Look over there, there’s a bit of blue sky.” Her reply: “You have to have enough blue sky to make a pair of men’s trousers.” Seeing my utter confusion she added: “and then it will clear up for the day.”
Now, I ask each and every one of you – have you ever heard this saying before?