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1 result for “leap year”
Formulae (1)
Time & Calendar
Basic
Leap Year Rule
leap
⟺
(
y
m
o
d
4
=
0
∧
y
m
o
d
100
≠
0
)
∨
(
y
m
o
d
400
=
0
)
\text{leap} \iff (y \bmod 4 = 0 \;\wedge\; y \bmod 100 \neq 0) \;\vee\; (y \bmod 400 = 0)
leap
⟺
(
y
mod
4
=
0
∧
y
mod
100
=
0
)
∨
(
y
mod
400
=
0
)
Tests whether a Gregorian year has 366 days.