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A year is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the planet, four seasons are generally recognized: spring, summer, autumn and winter. In tropical and subtropical regions, several geographical sectors do not present defined seasons; but in the seasonal tropics, the annual wet and dry seasons are recognized and tracked.
A calendar year is an approximation of the number of days of the Earth's orbital period, as counted in a given calendar. The Gregorian calendar, or modern calendar, presents its calendar year to be either a common year of 365 days or a leap year of 366 days, as do the Julian calendars (see below). For the Gregorian calendar, the average length of the calendar year (the mean year) across the complete leap cycle of 400 years is 365.2425 days. In English, the abbreviations "y" and "yr" are commonly used ("a" is also used) for the unit of time, though its exact duration may be inconsistent.
In astronomy, the Julian year is a unit of time; it is defined as 365.25 days of exactly 86,400 seconds (SI base unit), totalling exactly 31,557,600 seconds in the Julian astronomical year.The word year is also used for periods loosely associated with, but not identical to, the calendar or astronomical year, such as the seasonal year, the fiscal year, the academic year, etc. Similarly, year can mean the orbital period of any planet; for example, a Martian year and a Venusian year are examples of the time a planet takes to transit one complete orbit. The term can also be used in reference to any long period or cycle, such as the Great Year.

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  1. B

    Re-sit time, 5 years flew by, any recommendations

    Well my Non domestic ticket runs out in December, just been looking around for local companies in chesterfield area, not many and one demands i do the catering as a pre-requisite (no chance), lol Can anybody recommend something local to Derbyshire and South Yorkshire ? Many thanks BS
  2. BobThomas

    I thought i’d kicked the habit 30 years ago...

    I bought my first house a while ago... needed a lot doing but my dad was around to point me in the right direction... we rewired and started to plumb top to bottom, wiped lead to copper... and lots of other stuff apprentices probably still get shown now. The plumbing is ‘all’ still intact with...
  3. D

    triton t80z had for 2.5 years now no hot water, low pressure light comes on when turn on

    Hi, just a homeowner who can decorate but that's about it. Have read a few forums about the triton t80z 9.5kw cold feed only and have ordered a new one as 5 of us use the shower every day so recon the heating filament might be knackered. I live in a hard water area. cold water in bathroom taps...
  4. P

    New member back in the gas game after 7 years out.

    Morning everyone quick hello to everyone ‍♂️. Already had a search and read up about peoples experiences with the magnacleanse.
  5. S

    stopcock found after 30 years!

    My mum has just had a new boiler fitted and we found the stopcock sticking out the plaster behind the old boiler. I have been looking for it for ages so it was quite nice to finally find it. Do you think it is safe to try and turn it after putting some wd40 on it and leaving it for a while?
  6. M

    New hot-water cylinder after three years??

    It's three years since I posted in these forums. (Then I was agonising how best to clean out 40-year-old pipework prior to having a new boiler fitted - all went well, with an excellent father & son removing the rads, hosing out a great deal of sludge, then refitting with thermostatic valves)...
  7. T

    This years post to the unvented forum

    As this particular section of the forum seems to attract one post per year I thought I'd better contribute something for 2018 before it's too late !!:)
  8. R

    Customer claiming against you after 6 years!

    I did a job in augest 2012 and last week received a letter in the post off there solicitor saying I was liable for a compression fitting leaking and causing some damage in augest 2018! The company I had then stopped trading in March 2015 as I went limited. Does anyone know where I stand etc?
  9. Darren Jackson

    ACS done again, 5 more years to go.

    Hi all, just finished my ACS re-assessments, to keep my qualifications up to date. Thats me good for another 5 years. There were dozens upon dozens of guys there doing met1 to fit smart meters, with no related background whatsoever. One guy I talked to was a truck driver and never been on a...
  10. A

    HW Pressure falling after 3 years. Where's the problem? Please help

    Hi Team, I moved into a new build in 2014 and the HW pressure and flow to all taps over the last 3 years has been good. Recently the HW flow rate has fallen gradually to the point where you can no longer really run a bath at an acceptable flow. The initial pressure on opening any HW tap is good...
  11. M

    Hi guys, I have a guy with 5 years intensive experience with CSCS, ECS, etc but hasn't actually done

    Hi guys, I'm working on a council estate in the north east atm and have been speaking to a guy who seems to really know his stuff. His brother has a company in Milton Keynes he has worked for him for the last 5 years but has a child in the north east. Despite gaining the knowledge and the...
  12. T

    How to get NVQ Level 3 quickly or in under 2 years?

    I'm going to do the full 2 years of the NVQ Level 2 in Plumbing and Heating and I would like to move out of my parents and town as soon as possible. The thing is, it looks like you can barely survive on apprentice wage which is literally below minimum wage (£3.05) and even under 18 year old's...
  13. G

    Help!!!No hot hot water from kitchen tap in 6 years. Unvented ish

    Hi. I have wanted this issue resolved since we moved in 6 years ago. INFO -Unvented tribune premier Expansion vessel full of air at 2.5psi -Gush of water when bath tap on then reduces to normal -Towel rail in bathroom plumbed into partly central heating circuit -dont think there is an air...
  14. king of pipes

    How things have changed in 30 years .

    Just finished a tricky heating and hotwater upgrade had to replace a 30year old glowworm fuelsaver and customer did not want to see any pipework or the new boiler so fitted the baxi 412 Heat with a rear flue no permanent live or pump overun needed all worked out ok only negative is i dont like...
  15. J

    Welcome all after few years to make first post

    Welcome fee years but finally writing first,
  16. P

    Jobs that come back to bite you years later

    So we've all made mistakes yes? We've all done jobs where you've had to make connections that you're always a little worried about. Back in April 2010 I did a bathroom and I still had a lot to learn as it was early days but basically the new bath was 2" higher than the old one and the hot...
  17. G

    Ideal classic sealed system 15 years old

    s plan. Zone valves opening and closing. Boiler will run and radiators get hot but when turned off boiler will not fire - pump gets really hot and I would say faulty but when it does run all the radiators get hot so it seems to be doing its job. Also it's a sealed system I haven't noticed...
  18. Alpha man

    Safe for another 5 years......

    Well, that's me re qualified for another 5 years, can go back to work now and rest the ole brain!! Lol, used Gas Train at Medway, and will recomend those guys!
  19. S

    Unvented Expansion Vessel Keeps Failing

    I have a RM Stelflow 210 indirect unvented cylinder. Over the years it's been in, the expansion vessel has failed on 3 occasions. Any ideas what could be causing this? cheers, Stephen
    • stephenr
    • Thread
    • expansion expansion vessel failing keeps serviced unvented vessel years
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  20. turnpin

    Mothers Day.....

    Hope you boys and girls on the forums have made a fuss of your Mums and the mothers of your children.....although I'm away My kids have given me cards to pass on to my Mrs...and they have Facebooked messages to her hope you have all enjoyed sharing time and greetings with your own Mums....alas...
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