Prepositions with time

Here is the rule:

Examples:

• He was born IN the first century.
• The first man landed ON the moon ON July 21,1969.
• The Britain soccer is usually played ON Saturdays.
• You can see the stars AT night.
• In many countries, children have to start school AT the age of five.
• It's difficult to listen when everyone is speaking IN the same time.
• he Russian Revolution took place IN the 1917s.
• He isn't here AT the moment. He'll be back IN about five minutes.
• I learned to drive IN four weeks.
• The course begins ON September 7th and ends ON June 10th.
• I got up AT 7:00 AM.
• Are you doing anything special ON the weekend?
• Hurry up! We have got to go IN four minutes.
• I haven’t seen him for a few days. I last saw him ON Friday.
• I'll call you ON Monday morning. Okay?
• I might not be home IN the morning. Can you call IN the afternoon instead?
• Her friend's grandmother died IN 1988 AT the age of 101.
• I get paid AT the end of the month.
• Her brother is an engineer, but he’s unemployed AT the moment.
• The price of electricity is going up IN October.
• ON Sunday afternoons I usually go for a walk IN the park.
• It's so peaceful to walk around town AT night.
• IN summer, for a few days, we go to swim.
• AT the end of the course, I come back home.
• I've been invited ON December 12.
• She's just going out to do some shopping. She'll be back IN half and hour.
• He works hard during the week, so he lakes to relax ON weekends. S
• he got married AT 16, which is rather young to get married.
• The telephone rang and the doorbell rang AT the same time.
• The always go out for dinner ON their wedding anniversary.
• He's 63. He'll be retiring from his job IN two years' time.