Editing Leap year starting on Monday (section)

=== Gregorian Calendar ===
Leap years that begin on Monday, along with those [[Leap year starting on Saturday|starting on Saturday]] and [[Leap year starting on Thursday|Thursday]], occur least frequently: 13 out of 97 (≈ 13.4%) total leap years in a 400-year cycle of the [[Gregorian calendar]]. Their overall frequency is thus 3.25% (13 out of 400) of years.

{| class="wikitable"
|+ Gregorian leap years starting on Monday<ref name=math/>
!scope=row| Decade
! 1st !! 2nd !! 3rd !! 4th !! 5th !! 6th !! 7th !! 8th !! 9th !! 10th
|- style="opacity: 0.5;"

! style="background-color:#efefef;" | [[16th century]]
| colspan="8" |  ''prior to first adoption (proleptic)''|| || [[1596]]
|-
![[17th century]]
|
|
|[[1624]]
|
|
|[[1652]]
|
|[[1680]]
|
|
|-
! style="background-color:#efefef;" | [[18th century]]
|  || [[1720]] ||  ||  || [[1748]] ||  ||  || [[1776]] ||  || 
|-
! style="background-color:#efefef;" | [[19th century]]
|  || [[1816]] ||  ||  || [[1844]] ||  ||  || [[1872]] ||  || 
|-
! style="background-color:#efefef;" | [[20th century]]
| || [[1912]] ||  ||  [[1940]] ||  ||  || [[1968]] ||  ||  || [[1996]]
|-
! style="background-color:#efefef;" | [[21st century]]
|  ||  || [[2024]] ||  ||  || [[2052]] ||  || [[2080]] ||  ||
|-
! style="background-color:#efefef;" | [[22nd century]]
|  || [[2120]] ||  ||  || [[2148]] ||  ||  || [[2176]] ||  ||
|-
! style="background-color:#efefef;" | [[23rd century]]
|  || [[2216]] ||  ||  || [[2244]] ||  ||  || [[2272]] ||  || 
|-
! style="background-color:#efefef;" | [[24th century]]
| || [[2312]] ||  || [[2340]] ||  ||  || [[2368]] ||  ||  || [[2396]]
|-
! style="background-color:#efefef;" | [[25th century]]
|  ||  || [[2424]] ||  ||  || [[2452]] ||  || [[2480]] ||  || 
|-
! style="background-color:#efefef;" | [[26th century]]
|  || 2520 ||  ||  || 2548 ||  ||  || 2576 ||  ||
|-
! style="background-color:#efefef;" | [[27th century]]
|  || 2616 ||  ||  || 2644 ||  ||  || 2672 ||  || 
|}

{| class="wikitable"
|+ 400-year cycle
|-
! 0–99
| 24 || 52 || 80 ||
|-
! 100–199
| 120 || 148 || 176 ||
|-
! 200–299
| 216 || 244 || 272 ||
|-
! 300–399
| 312 || 340 || 368 || 396
|}