is it normal to wear school uniform at home after school ?

the reason i ask is because my sister who is 16 always wears her school uniform indoors after school , its not unusual for her to still be wearing a shirt and tie at 9pm the only thing she takes off is her shoes and blazer, for me i am normally out of uniform within the first hour of getting home, although i sometimes keep on my white shirt and skirt if i am not going out, is this a normal thing ?

Neither is more or less normal than the other.

usually, i can't be bothered to change, so i just stay in my uniform

yes but do you keep your tie on etc, my sister does, i sometimes keep my skirt and shirt on but take off blazer and tie ?

sometimes i will, I also have to wear a lanyard in school, and i keep that on as well sometimes

whats a lanyard ?

its a loop of fabric that has an identity card attached to the end of it

i think it's normal because a lot of my friends used to do it. but personally don't see the point. it isn't comfy and i feel like my uniform always made me feel dirty, i always looked forward to coming home and getting into more comfortable clothes