Looking back at baby photos of me from the 70's (rural Ireland), I realise that my Mum (Catholic, born in the 1930's) nearly always wore a headscarf when she was out of the house during the day.
Being the 1970's, the scarves were often brown/orange/mustard and of course nylon, and she must have abandoned them by the time I was 3 or 4 because they were in my dressing-up collection by then. She had a small black lace mantilla and I think I remember that she sometimes wore it to Mass, probably around the time she ditched the headscarf for daily wear but was wondering how to cover her head in church, but it disappeared (into my dressing-up box too!) pretty soon.
Sometimes they were tied behind her head (summer?) and sometimes under her chin, like the Queen (winter?).
My Nanna (Dublin/Protestant/working class, born in 1910) never ever left the house without wearing a hat (usually a knitted one, with a smart one for occasions/funerals etc.).
Was this just Ireland? Common in the UK too?