Cool Moon Facts by Whip

Real astronomy and dated history, with sources. Documented traditions and folklore. Modern lunar astrology · symbolic, not predictive.

Chart basics · Beginner

Time zone

Also called IANA time zone

The region whose clocks share one set of rules for their offset from UTC, including historical changes and daylight saving.

To turn a birth time into the instant a chart needs, the offset the clocks used on that date must be known. Zones change their rules; the IANA Time Zone Database records the history, for example that Britain stayed on UTC+1 all year from 1968 to 1971. This site uses the IANA zone of the birthplace and the browser's copy of the database, and shows the offset it applied.

Where sources differ
Records before about 1970 are reconstructed and can be wrong for some places; a manual UTC offset is offered for those.
  • Kind: Calculation
  • Tradition: Shared across Western traditions
  • In this site’s birth chart: used

Related: Coordinated Universal Time, Daylight saving time, Local mean time, Birth time

Written for Cool Moon Facts in its own words. An astrology source documents what astrologers believe or practise; it does not establish that astrology works.

All terms · Your birth chart

Settings

Your location

Only used to work out rise and set times. It stays in this browser.

Moon orientation

Southern-hemisphere skies show the moon flipped. This follows your location automatically.

Saved facts

Everything saved here

This site keeps your location, your saved facts and your settings in this browser and nowhere else. Nothing is uploaded, and nothing here can be recovered once it is gone.

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