How do blind people know what time it is if nobody is around?

Question

?? My cousin is blind

Answer 1

There are watches with Braille faces (the crystal opens up). There are also digital watches that say the time.

Answer 2

They will have the sense of diurnal (or circadian) rythms.

A circadian rhythm is a roughly-24-hour cycle in the physiological processes of living beings, including plants, animals, fungi and cyanobacteria. The term "circadian", coined by Franz Halberg, comes from the Latin circa, "around", and diem or dies, "day", meaning literally "about a day." The formal study of biological temporal rhythms such as daily, tidal, weekly, seasonal, and annual rhythms, is called chronobiology.

http://en.wikipedia.org/wiki/Circadian_rhythm

The pineal gland and retina of the turkey rhythmically produce melatonin. In birds kept under a daily light–dark (LD) illumination cycle melatonin concentrations in the pineal gland and retina were low during the light phase and high during the dark phase. A similar melatonin rhythm with high night-time values was also observed in the plasma. The pineal and retinal melatonin rhythms mirror oscillations in the activity of serotonin

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WG0-4H9YC2J-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=c63a794816901b65131d0fd06071a9b6

http://www.search.com/search?q=diurnal+or+circadian+rhythm&respell=1

Answer 3

There has to be some kind of a watch made specially for blind people

Answer 4

If a tree falls alone in the forest, does it make a sound?

If the sun fell out of the sky and hit earth, would it be a tad warmer?

If bigfoot peed on the whitehouse, would it still be white? or would it be yellow?

Answer 5

All their other senses are heightened.
Some have developed radar like senses and get a radarlike picture in their head.

Nah, i knew a person who had a watch that spoke in a digital voice what time it was.

Answer 6

They have digital watches that beep at the hour.
And kucoo clocks.