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A year is the orbital period of 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 changes in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the globe, 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, 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. The ISO standard ISO 80000-3, Annex C, supports the symbol "a" (for Latin annus) to represent a year of either 365 or 366 days. In English, the abbreviations "y" and "yr" are commonly used.
In astronomy, the Julian year is a unit of time; it is defined as 365.25 days of exactly 7004864000000000000♠86400 seconds (SI base unit), totalling exactly 7007315576000000000♠31557600 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 or 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. C

    Currently awaiting repair Combi Boiler leaking for 8 years. Is my plumber incompetent?

    Hi everyone, my combi boiler has been leaking for 8 years. It is a german Vaillant VCW 204 The thing is, this device is from...
  2. 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.
  3. 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).
  4. 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?
  5. 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...
  6. 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...
  7. Harvest Fields

    Shower tray new build 2 years old

    Please see attached pictures. The current tray is leaking through into the kitchen. It is as they say a one for one tray swap as the tray is cracked. Until I found this behind the tiles :(. Any idea on how I can get a better Seal, without coming back out to it in another 2 years. Or is renewing...
  8. J

    Welcome all after few years to make first post

    Welcome fee years but finally writing first,
  9. 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!
  10. 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
  11. 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...
  12. Best

    Martin McGuinness dead

    I won't celebrate the illness and death of Martin, nor would I wish it on anyone. Sympathy to his family, but they can be thankful at least they got to prepare for his death and no doubt got to say goodbye, unlike most of the relatives of IRA victims. Also he reached 66 years, unlike most...
  13. S

    lets all design a boiler, top notch components.

    Evening all, I'm currently in the alps snowboarding. I've just had my meal and browsing some recent posts and got me wondering about what is the best boiler on the market, we all have our preferences. After ideals shamble of shat ' isar' I vowed never to touch an ideal again, but I was coaxed in...
  14. G

    Online/Electronic Gas Safety Cert App/Software

    Hi guys Anyone care to share an easy to use app or software for doing GSC's and emailing direct to client? Just looking at buying a tablet and app or software for this. Many thanks
  15. H

    New central heating programmer required, but please one that lasts 20 years if possib

    New central heating programmer required, but please one that lasts 20 years if possible. Previous one was a BG DRAYTON SM2 29206SX DUAL-CHANNEL MECHANICAL PROGRAMMER The current one is a Simens RWB2E The drayton one calls for hot water all the time so that's no good. The Simens one will...
  16. 3

    Wolf Boiler CGB-K-20

    Hi, First time poster, so please be gentle!. I have been having problems with my Wolf Boiler for the last 4 years (usually over winter) but cannot seem to get anyone out who knows how to fix the problems (I've had 4 different local plumbers who have probably had nye on 100 years experience...
  17. D

    From S.W London. Done Level 2 & 3 C&G 6128 Plumbing but want to get full NVQ any help

    Hi my name is David. I'm 29 years old. I live in South West London. I spent 2 years doing my City & Guilds Level 2 & 3 of the 6128 Plumbing and Heating course. I then went on to work for a small company domestically as an apprentice for 3 years which was good, really enjoyed and I learned a lot...
  18. F

    single pipe system without bypass between rads

    Some old Builder giving it large today about sytems without a bypass between each rad and you cant take that rad off because it will stop the whole system and bla bla bla as its his job i gave him my 2 cents and he didnt want to know so shut my trap and left him to it i've never seen such a...
  19. K

    Motorised Valves which ones !!!!!

    Hi Im Ian and new to this forum, ive been in the trade for 33 years and worked for myself for 22, I maintain and service mainly, I fit quite a lot of motorised valves and religiously always fitted Honeywell, then I started getting issues with them and the price was shooting up, I tried Tower...
  20. G

    Total novice in plumbing

    Hi guys, I'm at a point in my life that I need to learn a trade and make a career out of it. I've wasted the past 3 years of my life working but to no avail. I'm 23 and will be joining my local college for a lvl 3 in plumbing. I learn quick and will try and soak up as much knowledge as I can...

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