The ATONIN Time Pyramid

The ATONIN Time Pyramid can help people remember which preposition – at, on or in – to use with hours, days, months, years, etc.

An easy way to remember which preposition to use with hours, days, weeks, months, years, decades, ages.

Do you have a difficult time remembering which preposition to use with hours, days, months, years, etc?

Imagine a pyramid divided horizontally into 3 groups.

At the top of the pyramid you have “AT” and this is used for the smallest in time: hours

"I’ll meet you AT 7 p.m."

In the middle of the pyramid you have “ON” and this is used for bigger time: days

"See you ON Saturday."

At the bottom you have “IN” and this is used for everything else that is bigger than hours or days

"I was born IN 1964."
"He takes holidays IN January."
"They played great music IN the 80′s."


http://edition.tefl.net/ideas/vocab/atonin-time-pyramid/