What's the differences between "해" & "년" ?
Hello everyone !
i know that "해\hae" is in present, the basic form is 하다 & it's mean doing !
but O_O when i trans it at Google it's mean "year" !
and as i know year in Korean is "년\Nyeon" !
my Qs are !
- What's the differences between "해" & "년" ?
- Which the word of the two is used to express the "year" meaning more ?
- Is it wrong if i say "해" to express the "year" word to Korean people ?
& Thank You Very Much ^^

Question

Answer

'there are certain set expressions: 올해,작년...' - chin.billy.leung

Yup. It's best it is to learn those expression, just keep in mind 해 and 년 stands "year". 
E.g.: 새해 - new year, 그해 - that year, 올해 - this year, 작년 - last year, 금년 - this year, 내년 - next year, 매년 - every year. 
Beside this the only way is to study text or conversation to fully grasp when you can use 해 & 년. 
Just gonna add that 해 is used with pure korean numbers and 년 with sino-korean

Answer

The word "해" is a proper noun that means the sun or a year in Korean.

When indicating or saying about the sun, "해" or  한자어(漢字語, sino-Korean word) "태양(太陽)" is used. Both of them mean the sun, for examples,

The sun rise from the east.
해는 동쪽에서 뜬다. 
태양은 동쪽에서 뜬다.

When indicating or saying about a year, "해" or 한자어 "년(年)" is used. For examples,

The weather is especially hot in this summer (of this year).
올해(or 금년[今年]) 여름은 날씨가 유난히 덥습니다.

Answer

there are certain set expressions:  올해,작년.  both are used.  I don't see any hard and fast rule.  Just adopt what you hear.

Answer

해 has the meaning of 'year'

ex)

같은 해에 태어났다.
새해가 밝았다.