Support tzdata rules with full length month names (#472)

Project.toml

@@ -1,7 +1,7 @@
 name = "TimeZones"
 uuid = "f269a46b-ccf7-5d73-abea-4c690281aa53"
 authors = ["Curtis Vogt <[email protected]>"]
-version = "1.18.0"
+version = "1.18.1"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"

src/tzdata/compile.jl

@@ -297,7 +297,7 @@ function Base.parse(::Type{Rule}, str::AbstractString)
  from = from_str != "min" ? parse(Int, from_str) : nothing
  to = to_str == "only" ? from : (to_str != "max" ? parse(Int, to_str) : nothing)
  type_str == "-" || throw(ArgumentError("Unhandled rule type: \"$type_str\""))
- month = MONTHS[month_str]
+ month = MONTHS[month_str[1:3]]
 
  # Now we need to get the right anonymous function
  # for determining the right day for transitioning

test/tzdata/compile.jl

@@ -68,6 +68,19 @@ end
 @test parse_date("2019 Mar Sun>=8 3:00") == (DateTime(2019,3,10,3), 'w') # America/Metlakatla (2018h)
 @test parse_date("2006 Apr Fri<=1 2:00") == (DateTime(2006,3,31,2), 'w') # Asia/Jerusalem (2019b)
 
+@testset "parse Rule" begin
+ # tzdata 2024b introduced the use of a non-three letter month: April
+ # https://github.com/JuliaTime/TimeZones.jl/issues/471
+ rule = parse(Rule, "1931 only - April 30 0:00 1:00 D")
+ @test rule.from == 1931
+ @test rule.to == 1931
+ @test rule.month == 4
+ @test rule.on(rule.from, rule.month) == Date(1931, 4, 30)
+ @test rule.at == TimeOffset(0)
+ @test rule.at_flag == 'w'
+ @test rule.save == TimeOffset(3600)
+ @test rule.letter == "D"
+end
 
 ### order_rules ###