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[[File:Circadian human.png|thumb|Typical circadian timings of physiological processes]]

[[File:Circadian human.png|thumb|Typical circadian timings of physiological processes]]

The circadian rhythm regulates a range of physiological processes that controls sleep-wake cycles. These rhythms are synchronized to [[Wikipedia:Local mean time|local solar time]] (rather than clock time) when they are stabilised. In some regions, local clock time can differ substantially from the solar time, and additional consideration is required to correctly plan circadian management measures.  

The circadian rhythm regulates a range of physiological processes that controls sleep-wake cycles. These rhythms are synchronized to [[Wikipedia:Local mean time|local solar time]] (rather than clock time) when they are stabilised. In some regions, local clock time can differ substantially from the solar time, and additional consideration is required to correctly plan circadian management measures.  

[[File:Solar vs clock time.png|thumb|Those living in red regions should subtract hours from their clock time to get the solar time, and those living in green regions should add hours. The number of hours is to add can be seen according to the colour legend below.]]

[[File:Solar vs clock time.png|thumb|Those living in red regions should subtract hours from their clock time to get the solar time, and those living in blue regions should add hours. The number of hours is to add can be seen according to the colour legend below.]]

{| class="wikitable"

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|+Typical circadian markers

|+Typical circadian markers