diff --git a/Project.toml b/Project.toml
index 53c44c07d..6f56ae9e9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "Compat"
 uuid = "34da2185-b29b-5c13-b0c7-acf172513d20"
-version = "3.21.0"
+version = "3.22.0"
 
 [deps]
 Base64 = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
diff --git a/README.md b/README.md
index ed3be9152..a763fea2b 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,8 @@ changes in `julia`.
 
 ## Supported features
 
+* `Dates.canonicalize` can now take a `Period` as an input ([#37391]) (since Compat 3.22)
+
 * Import renaming is available through the `@compat` macro, e.g. `@compat import LinearAlgebra as LA` and
   `@compat import LinearAlgebra: cholesky as c, lu as l`. *Note:* Import renaming of macros is not
   supported due to differences in parsing behavior ([#37396]). (since Compat 3.21).
@@ -224,3 +226,4 @@ Note that you should specify the correct minimum version for `Compat` in the
 [#29634]: https://github.com/JuliaLang/julia/pull/29634
 [#35243]: https://github.com/JuliaLang/julia/pull/35243
 [#37396]: https://github.com/JuliaLang/julia/pull/37396
+[#37391]: https://github.com/JuliaLang/julia/pull/37391
diff --git a/src/Compat.jl b/src/Compat.jl
index 241e28238..0e2448658 100644
--- a/src/Compat.jl
+++ b/src/Compat.jl
@@ -1,5 +1,8 @@
 module Compat
 
+import Dates
+using Dates: Period, CompoundPeriod
+
 import LinearAlgebra
 using LinearAlgebra: Adjoint, Diagonal, Transpose, UniformScaling, RealHermSymComplexHerm, BLAS
 
@@ -787,7 +790,7 @@ if VERSION < v"1.6.0-DEV.15"
         end
         return line, i
     end
-    
+
     function parseall(text::AbstractString; filename="none")
         filename = Symbol(filename)
         ex = Expr(:toplevel)
@@ -806,6 +809,11 @@ else
     using .Meta: parseatom, parseall
 end
 
+# https://github.com/JuliaLang/julia/pull/37391
+if VERSION < v"1.6.0-DEV.820"
+    Dates.canonicalize(p::Period) = Dates.canonicalize(CompoundPeriod(p))
+end
+
 include("iterators.jl")
 include("deprecated.jl")
 
diff --git a/test/runtests.jl b/test/runtests.jl
index 63659a347..b528cbaa6 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,4 +1,5 @@
 using Compat
+using Dates
 using Test
 using UUIDs: UUID, uuid1, uuid_version
 
@@ -728,7 +729,7 @@ end
 
     ex = Compat.parseall(
         raw"""
-        
+
         begin a = 1 end
 
         begin
@@ -751,6 +752,19 @@ end
     )
 end
 
+# https://github.com/JuliaLang/julia/pull/37391
+@testset "Dates.canonicalize(::Period)" begin
+    # reduce individual Period into most basic CompoundPeriod
+    @test Dates.canonicalize(Dates.Nanosecond(1000000)) == Dates.canonicalize(Dates.Millisecond(1))
+    @test Dates.canonicalize(Dates.Millisecond(1000)) == Dates.canonicalize(Dates.Second(1))
+    @test Dates.canonicalize(Dates.Second(60)) == Dates.canonicalize(Dates.Minute(1))
+    @test Dates.canonicalize(Dates.Minute(60)) == Dates.canonicalize(Dates.Hour(1))
+    @test Dates.canonicalize(Dates.Hour(24)) == Dates.canonicalize(Dates.Day(1))
+    @test Dates.canonicalize(Dates.Day(7)) == Dates.canonicalize(Dates.Week(1))
+    @test Dates.canonicalize(Dates.Month(12)) == Dates.canonicalize(Dates.Year(1))
+    @test Dates.canonicalize(Dates.Minute(24*60*1 + 12*60)) == Dates.canonicalize(Dates.CompoundPeriod([Dates.Day(1),Dates.Hour(12)]))
+end
+
 include("iterators.jl")
 
 # Import renaming, https://github.com/JuliaLang/julia/pull/37396,