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day

The word day has a number of meanings, depending on the context it is used such as of astronomy, physics, and various calendar systems.
As a term in physics and astronomy it is approximately the period during which the Earth completes one rotation around its axis, which takes about 24 hours. A solar day is the length of time which elapses between the Sun reaching its highest point in the sky two consecutive times. Days on other planets are defined similarly and vary in length due to differing rotation periods, that of Mars being slightly longer and sometimes called a sol.
The unit of measurement "day" (symbol d) is defined as 86,400 SI seconds.
The second is designated the SI base unit of time. Previously, it was defined in terms of the orbital motion of the Earth in the year 1900, but since 1967 the second and so the day are defined by atomic electron transition.
A civil day is usually 24 hours, plus or minus a possible leap second in Coordinated Universal Time (UTC), and occasionally plus or minus an hour in those locations that change from or to daylight saving time. Day can be defined as each of the twenty-four-hour periods, reckoned from one midnight to the next, into which a week, month, or year is divided, and corresponding to a rotation of the earth on its axis. However, its use depends on its context; for example, when people say 'day and night', 'day' will have a different meaning: the interval of light between two successive nights, the time between sunrise and sunset; the time of light between one night and the next. For clarity when meaning 'day' in that sense, the word "daytime" may be used instead, though context and phrasing often makes the meaning clear. The word day may also refer to a day of the week or to a calendar date, as in answer to the question, "On which day?"
The biologically determined living patterns (circadian rhythms) of humans and many other species relate to Earth's solar day and the day-night cycle.

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  1. Dan

    I F***ing Hate Valentines Day

    Here's the I Hate F***ing Valentines Day Thread Happy F***ing Hating On You Valentines People. We don't need no partner. We have each other? Here's the Happy Valentines Day Thread though if you ended up in the wrong one. ! :D
  2. Dan

    Happy Valentines Day

    This is the Happy Valentines Day Thread. :) Happy Valentines to you all. We hope you and your partner have a wonderful day. Look after the ladies now lads. No cheapskating them! Here's a link to I hate Fxxxing Valentines Day Thread. In case you ended up in this one by mistake. :)
  3. L

    My 1st Job Tiling course 1st day

    Hello and good evening. My name is Luke im currently doing a short diploma level two in floor and wall tiling, and thought i would share my journey. Please feel free to tell me what ive done wrong or doing right. My first timw ever laying a tile.
  4. B

    Porcelain tiles on top of 90 day old screed

    Hi After some advice, I am a DIY tiler and going to be tiling our kitchen extension floor with porcelain tiles ( have tiled before so confident with tiling). We had the screed laid (sand/cement @ 75mm) about 90 days ago, I’m confident it dried and has no cracking anywhere and level. The screed...
  5. Mapei UK Marketing

    Mapei Trade Day - Builder Depot, Staples Corner, London

    Neil will be hosting our trade day at Builder Depot, Staples Corner branch in London on Thursday 20th February, from 7.30am. He will be on hand for technical support & expert product advice. He will also be giving away our brand new #Mapei logo t-shirts & plenty of other freebies. So make sure...
  6. W

    Training Feedback Ardex Training Day

    I recently attended a large format tile training day run by Ardex, at their Haverhill trading centre. The day was very well organised and run by Andrea King & Vince Ruffini of Ardex, with support from Rubi - rail and cutting system. It was also a good opportunity to see and try some of the...
  7. J

    South East Tiler Needed in Redhill Friday 14/02/20 small kitchen day rate

    I’m a a Contracts Manager for a Flooring Contractor who also carries out tiling works to floors and walls. the job is near Redhill, Surrey. Small kitchen On a day rate. Please call or text me 07397863909 CSCSrequired
  8. T

    Boxing Day.

    Amazon Prime for football all day. 5.30 Newcastle are on😀. What’s others doing?
  9. Lou

    Day 23 Advent Calendar - It's Christmas Eve Eve!!!!

    Welcome to Day 23 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  10. Dan

    Advent Calendar - DAY 24! - Merry Christmas People :)

    Merry Christmas boys and girls. :) Thanks for all those who joined in the Christmas fun over the past few weeks. Today's question is; What's the date you're going back to work? Today's winner will get:- Bragging Rights Advent Calendar Win Tag (will be removed in the new year when you don't...
  11. Lou

    Day 22 Advent Calendar

    Welcome to Day 22 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  12. Lou

    Day 21 Advent Calendar

    Welcome to Day 21 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  13. Lou

    Day 20 Advent Calendar

    Welcome to Day 20 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  14. Lou

    Day 19 Advent Calendar

    Welcome to Day 19 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  15. Lou

    Day 18 Advent Calendar!

    Welcome to Day 18 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  16. Lou

    Day 17 Advent Calendar!

    Welcome to Day 17 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  17. Lou

    Day 16 Advent Calendar!

    Welcome to Day 16 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  18. Lou

    Day 14 Advent Calendar

    Welcome to Day 14 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  19. Lou

    Day 13 Advent Calendar

    Welcome to Day 13 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
  20. Lou

    Day 12 Advent Calendar!

    Welcome to Day 12 of the Advent Calendar Competition on TilersForums.com. Today we have up for grabs:- Mapei Goodie Bag (Will be sent out in a batch early Jan) Thanks @Mapei UK Marketing TilersForums Hat (Will be sent out in a batch early Jan) Username Tag (Will disappear 1st Jan) Today's...
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