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AppSignal installs in minutes and auto-configures dashboards, alerts, and error tracking.
Works out of the box for Rails, Django, Express, Phoenix, and more. Monitoring exceptions and performance in no time.
For each Date/Time since 1582-Oct-15 (start Gregorian Calendar): ++ add/sub days&hh:mm:ss - considered all leap years; summer time DST ++ compute start/end of DST ++ compute UTC (Greenwich) to local/DST ++ weekdays ++ Excel compatible date value