Calculating the week in a year, week in a month and quarter from a date

[Constantine Vass]

I have a date like this:

Today:

2014-08-30

From which I know 

Year= 2014

Month= 08 - August

Day= 30

I want to know:

1) from 52 weeks in a year, the week number this date occurred

Week=x

2) from 4 weeks in a month, the week number this date occurred

WeekInMonth=08-x

in format - Month-WeekNumberInAMonth

3) from 4 quarters in a year, the quarters this date occurred

Quarter=x

Ho to make this in most effective way?

[Rui Ueyama]

Which do you count January 5th in the following calendar as, first week or second week of the year? Also, is January 5th is first week or second week in January?

      January               February               March          
Su Mo Tu We Th Fr Sa  Su Mo Tu We Th Fr Sa  Su Mo Tu We Th Fr Sa  
          1  2  3  4                     1                     1  
 5  6  7  8  9 10 11   2  3  4  5  6  7  8   2  3  4  5  6  7  8  
12 13 14 15 16 17 18   9 10 11 12 13 14 15   9 10 11 12 13 14 15  
19 20 21 22 23 24 25  16 17 18 19 20 21 22  16 17 18 19 20 21 22  
26 27 28 29 30 31     23 24 25 26 27 28     23 24 25 26 27 28 29  
                                            30 31                 

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[Constantine Vass]

Yeas, week in a month does not make sense because the first and last in each month overlap.

Still there a 52 weeks in a year. 

The idea is to represent this information in a chart- a year has 4 Quarters - easily to represent 

in a chart - the number of months in year is divided 3 and we have 4 Quarters - because 1 Quarter is 3 months 

If I want to represent a Month similar way in a chart - yes I can divide by 3 and have 3 divisions by 10 days -

but 10 days do not have a name like Quarter, thus -the week in a month. But it is not correct obviously.

[Constantine Vass]

4–4–5 calendar is more appropriate for this case

[Sam Fourman Jr.]

On Sat, Aug 30, 2014 at 5:21 PM, Constantine Vass <ths...@gmail.com> wrote:

4–4–5 calendar is more appropriate for this case

On Saturday, August 30, 2014 3:10:46 PM UTC-7, Constantine Vass wrote:

Yeas, week in a month does not make sense because the first and last in each month overlap.

Still there a 52 weeks in a year. 

package main

import "fmt"

import "time"

func main() {

        year, week := time.Now().ISOWeek()

        fmt.Printf("Year %d\n", year)

        fmt.Printf("Week %d\n", week)

} 

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Sam Fourman Jr.