Mean solar noon estimate
Estimate UTC mean solar noon using longitude.
Open tool →Tools and learning resources
Choose a specific tool and review the method and limitations before relying on a result.
Longitude distance
Estimate kilometres per degree longitude at a latitude.
Open tool →Calendar-day difference
Compare two dates by elapsed UTC calendar days.
Open tool →Moon phase approximation
Find approximate lunar age and illuminated fraction for a date.
Open tool →Daylight hours by latitude
Approximate daylight hours based on latitude and day of year.
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