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How Does Daylight Savings Time Affect Your Dog?

Posted March 06, 2015 in Dog Behavior

Dog sleeping with his owner

It’s time for our twice-yearly clock adjustment to save energy and eliminate excuses to wake up earlier.  Everyone in U.S., with the exception of Arizona and Hawaii, sets clocks forward one hour at 2 a.m. on the second Sunday of each March. This inevitably causes millions of Americans to miss worship the following morning and millions more to be sleepy for the next couple of weeks. While we pour an extra cup of coffee on Monday to shake off the lost sleep, what effect does daylight savings time have on our dogs?

History of daylight savings time
According to, Benjamin Franklin is part of the reason we change our clocks. He observed people burned candles to work into the night and sleep during the morning sunshine, wasting valuable oil, wax and free light. Franklin suggested, jokingly, in an essay, “An Economical Project for Diminishing the Cost of Light” that Parisians could adjust clocks according to the seasons to save resources and maximize productivity. In 1916 the Germans became the first country to officially implement the idea.  The U.S. followed during World War I in 1918, resulting in almost a century of grumpy Americans complaining each March about a “lost hour.” This 60-minute modification really throws our body’s natural rhythm out of sync resulting in insomnia, moodiness, lost focus and productivity. Our dogs also feel the effects of the time change, although not in the same ways we do.

How are dogs affected by daylight savings time?
Dogs are creatures of light. That is, animals are closely tuned to the cycles of light and dark in terms of their physiology and behavior. Dogs tend to wake when the sun rises and sleep after sunset. Many dogs have precise patterns; they do the same things at the same time every day like clockwork, but they can’t read clocks. Because dogs can’t read time, arbitrary movements of the hour hand should have less affect on their daily routines. Or does it?

What really disrupts our dog’s lifestyle during daylight savings time changes are the sudden differences in our daily routines. Your dogs will probably be awakened an hour earlier or later to go potty. Their meals will be served at a different time; walks are rescheduled and it feels different when human family members come and go. Mornings get brighter and come earlier and evening walks warmer and later. For most dogs, these changes are abrupt, unexpected, and challenging. They may ponder, “Why am I eating now? Why do I have to get up so early?” We need to ask how we can help our dogs adjust to time changes.

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Ernie has more than 20 years of experience in the veterinary industry and is a well-known veterinarian, media personality and author. He is also a founding member of IDEXX’s Pet Health Network team.