Diurnal
# Diurnal

Diurnal ("daily") may refer to:

## General

* Diurnal cycle, any pattern that recurs daily
   * Diurnality, the behavior of animals and plants that are active in the daytime
* Diurnal phase shift, a phase shift of electromagnetic signals
* Diurnal temperature variation, a cycle of daily temperature change

## Astronomy

* Diurnal arc, the time (expressed in right ascension) that it takes a planet etc. to move from its rising to its setting point
* Diurnal motion, the apparent motion of stars around the Earth

## Astrology

* Diurnal chart, a chart for a given date, based on the natal chart
* Diurnal planet, a planet in a sect for which the Sun is above the horizon
* Diurnal sign, a sign in the zodiac
