I am writing a scientific article and have a question regarding the time of day. I am using the the system without a.m. and p.m.. So I have time of days like: 9:00, 15:00 (3 p.m.) and 23:00 (11 p.m.). If I want to adress a certain time can I use 'o'clock' like: "From 16 o’clock – 19 o’clock"
Or how would you do that?