What are the different global time periods and their relevant duration used by Site24x7's reporting engine?

Last 1 Hour

From 60 minutes ago until the current time

Last 6 Hours

From 6 hours ago until the current time 

Last 12 Hours

From 12 hours ago until the current time

Last 24 Hours

From 24 hours ago until the current time

Today

Yesterday

From 12 am of the previous calendar day until 12 am of the current calendar day

This Week (sun - yesterday)

For example, if the current day is Wednesday, data will be shown from 12 am of Sunday of the current calendar week until 12 am of the current calendar day (Wednesday) 

Last Week (sun - sat)

For example, if the current day is Wednesday, data will be shown from 12 am of Sunday of the previous calendar week until 12 am of Sunday of the current week

Last 7 days

For example, if the current date is May 15 2018, data will be shown from 12 am of May 08 2018 until 12 am of the current day (May 15 2018) 

Last 30 days

For example, if the current date is May 15 2018, data will be shown from 12 am of April 15 2018 until 12 am of the current day (May 15 2018).  

This Month

Last Month

For example, if the current month is May, data will be shown from 12 am of April 1st until 12 am of May 1st.

Last Quarter

For example, if the current month is May, data will be shown from 12 am of January 1st until 12 am of April 1st.

This Quarter

For example, if the current month is April, data will be shown from 12 am of April 1st until 12 am of the current day in the quarter.

Last 3 Months

For example, if the current month is May, data will be shown from 12 am of February 1st until 12 am of May 1st. This will exclude the current month.

This Year

For example, if the current year is April 2018, data will be shown from 12 am of January 1st 2018 until 12 am of the current day.