Rails allows calling `to_s` with an optional format argument on dates. This can lead to cryptic "wrong number of args" errors when you end up calling something like `http://nil.to _s(:db)` Using the alias `to_formatted_s(:db)` leads to a much nicer "no method error"
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Why not?
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Yup. And for other uses you probably really want ISO 8601.
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Nah clearly julian days since 2000-01-01 as a float is the way to go
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