Oh, wow, treating the '-' as a minus sign is ... surprising. lholman, for what it's worth, there *is* a standard format for dates, which you can use: https://tc39.github.io/ecma262/#sec-date-time-string-format
Bug 1515318 Comment 1 Edit History
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Oh, wow, treating the '-' as a minus sign is ... surprising. lholman, for what it's worth, there *is* a standard format for dates, which you can use: https://tc39.github.io/ecma262/#sec-date-time-string-format