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JuliaTime / TimeZones.jl

IANA time zone database access for the Julia programming language
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Dates.format dispatches to TimeZones.format #374

Open samtkaplan opened 2 years ago

samtkaplan commented 2 years ago

This causes an error. For example in Julia 1.7.2, I see:

julia> using TimeZones, Dates

julia> Dates.format(now(), "yyyy-mm-ddTHH:MM:SSZ")
ERROR: type DateTime has no field zone
Stacktrace:
 [1] getproperty
   @ ./Base.jl:42 [inlined]
 [2] format(io::IOBuffer, d::Dates.DatePart{'Z'}, zdt::DateTime, locale::Dates.DateLocale)
   @ TimeZones ~/.julia/packages/TimeZones/1ALMR/src/parse.jl:81
 [3] macro expansion
   @ /opt/julia/share/julia/stdlib/v1.7/Dates/src/io.jl:663 [inlined]
 [4] format(io::IOBuffer, dt::DateTime, fmt::DateFormat{Symbol("yyyy-mm-ddTHH:MM:SSZ"), Tuple{Dates.DatePart{'y'}, Dates.Delim{Char, 1}, Dates.DatePart{'m'}, Dates.Delim{Char, 1}, Dates.DatePart{'d'}, Dates.Delim{Char, 1}, Dates.DatePart{'H'}, Dates.Delim{Char, 1}, Dates.DatePart{'M'}, Dates.Delim{Char, 1}, Dates.DatePart{'S'}, Dates.DatePart{'Z'}}})
   @ Dates /opt/julia/share/julia/stdlib/v1.7/Dates/src/io.jl:658
 [5] format(dt::DateTime, fmt::DateFormat{Symbol("yyyy-mm-ddTHH:MM:SSZ"), Tuple{Dates.DatePart{'y'}, Dates.Delim{Char, 1}, Dates.DatePart{'m'}, Dates.Delim{Char, 1}, Dates.DatePart{'d'}, Dates.Delim{Char, 1}, Dates.DatePart{'H'}, Dates.Delim{Char, 1}, Dates.DatePart{'M'}, Dates.Delim{Char, 1}, Dates.DatePart{'S'}, Dates.DatePart{'Z'}}}, bufsize::Int64)
   @ Dates /opt/julia/share/julia/stdlib/v1.7/Dates/src/io.jl:670
 [6] format(dt::DateTime, fmt::DateFormat{Symbol("yyyy-mm-ddTHH:MM:SSZ"), Tuple{Dates.DatePart{'y'}, Dates.Delim{Char, 1}, Dates.DatePart{'m'}, Dates.Delim{Char, 1}, Dates.DatePart{'d'}, Dates.Delim{Char, 1}, Dates.DatePart{'H'}, Dates.Delim{Char, 1}, Dates.DatePart{'M'}, Dates.Delim{Char, 1}, Dates.DatePart{'S'}, Dates.DatePart{'Z'}}})
   @ Dates /opt/julia/share/julia/stdlib/v1.7/Dates/src/io.jl:669
 [7] format(dt::DateTime, f::String; locale::Dates.DateLocale)
   @ Dates /opt/julia/share/julia/stdlib/v1.7/Dates/src/io.jl:709
 [8] format(dt::DateTime, f::String)
   @ Dates /opt/julia/share/julia/stdlib/v1.7/Dates/src/io.jl:709
 [9] top-level scope
   @ REPL[3]:1
omus commented 2 years ago

Related upstream issue: https://github.com/JuliaLang/julia/issues/29339

omus commented 2 years ago

You can work around this problem by escaping the characters you want to treat as literals:

julia> using TimeZones, Dates

julia> Dates.format(now(), "yyyy-mm-dd\\THH:MM:SS\\Z")
"2022-02-25T10:03:06Z"

julia> Dates.format(now(), dateformat"yyyy-mm-dd\THH:MM:SS\Z")
"2022-02-25T10:03:14Z"