It was around 1982.
Summer, friday night.
My 2 sisters made some story up about going somewhere (i.e. they didn't want me tagging along) shopping
at the mall i think.
They get home at 10pm. Both of them with wet hair and get this, my blonde sister now had light green hair haha.
They maintained the shopping story but I knew they went to the neighbors pool a few blocks up.
Seems like my sister with blonde hair often had it green whenever we went swimming except for the one public
pool that was part of a high school.