From 32f2432c17b3b671cecdafde9fb792e3c5bfac59 Mon Sep 17 00:00:00 2001
From: Moelf <proton@jling.dev>
Date: Sun, 30 Aug 2020 00:24:44 -0400
Subject: [PATCH] add rouding for DateTime to Date

---
 stdlib/Dates/src/rounding.jl  |  6 ++++++
 stdlib/Dates/test/rounding.jl | 12 +++++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/stdlib/Dates/src/rounding.jl b/stdlib/Dates/src/rounding.jl
index 0d77377388618..53e680a6bfd1b 100644
--- a/stdlib/Dates/src/rounding.jl
+++ b/stdlib/Dates/src/rounding.jl
@@ -284,7 +284,13 @@ Base.round(x::TimeTypeOrPeriod, p::Period) = Base.round(x, p, RoundNearestTiesUp
 # Make rounding functions callable using Period types in addition to values.
 Base.floor(x::TimeTypeOrPeriod, ::Type{P}) where P <: Period = Base.floor(x, oneunit(P))
 Base.ceil(x::TimeTypeOrPeriod, ::Type{P}) where P <: Period = Base.ceil(x, oneunit(P))
+Base.floor(::Type{Date}, x::TimeTypeOrPeriod, ::Type{P}) where P <: Period = Base.floor(Date(x), oneunit(P))
+Base.ceil(::Type{Date}, x::TimeTypeOrPeriod, ::Type{P}) where P <: Period = Base.ceil(Date(x), oneunit(P))
 
 function Base.round(x::TimeTypeOrPeriod, ::Type{P}, r::RoundingMode=RoundNearestTiesUp) where P <: Period
     return Base.round(x, oneunit(P), r)
 end
+
+function Base.round(::Type{Date}, x::TimeTypeOrPeriod, ::Type{P}, r::RoundingMode=RoundNearestTiesUp) where P <: Period
+    return Base.round(Date(x), oneunit(P), r)
+end
diff --git a/stdlib/Dates/test/rounding.jl b/stdlib/Dates/test/rounding.jl
index 0227535b46d94..b9fa2fcec42ca 100644
--- a/stdlib/Dates/test/rounding.jl
+++ b/stdlib/Dates/test/rounding.jl
@@ -188,6 +188,17 @@ end
     @test round(x, Dates.Microsecond) == Dates.Microsecond(2001000)
     @test round(x, Dates.Nanosecond) == x
 end
+
+@testset "Rouding DateTime to Date" begin
+    now_ = now()
+    for p in (Year, Month, Day)
+        for r in (RoundUp, RoundDown)
+            @test round(Date, now_, p, r) == round(Date(now_), p, r)
+        end
+        @test floor(Date, now_, p) == round(Date, now_, p, RoundDown)
+        @test ceil(Date, now_, p)  == round(Date, now_, p, RoundUp)
+    end
+end
 @testset "Rounding for periods that should not need rounding" begin
     for x in [Dates.Week(3), Dates.Day(14), Dates.Second(604800)]
         local x
@@ -229,4 +240,3 @@ end
 end
 
 end
-