[543] Added xdm:localTimezoneOffset to context/placecontext

[cluby-adobe]

#543

@kstreeter & @cdegroot-adobe

[kstreeter]

Hey @cluby-adobe this addition makes sense, but would it make sense to make the offset a string that has the same form of the offset defined in ISO8601? This definition seems to be what they do in Javascript, but in Java they appear to support the string form.

[cluby-adobe]

@cluby-adobe, The issue is we don't know the actual timezone. We only have the current offset.

[kstreeter]

Understood we would not have the actual timezone, just the offset. ISO8601 has a notation for that (a "-" followed by the HH:MM of the offset). That notation appears to be supported at least in the Java environment.

[cluby-adobe]

@kstreeter, Do you know of anything that tries to use this format for timezone offset on it's own outside of a date-time string? I want to make sure there is value in using this format to justify the cost of dealing with in at various layers. If every layer is just going to have to convert it into minutes to use it why don't we just represent it as minutes.