It it now a leap year?
Robin Laing
Robin.Laing at drdc-rddc.gc.ca
Thu Aug 9 16:46:49 UTC 2007
Karl Larsen wrote:
> Mike - EMAIL IGNORED wrote:
>> On Thu, 09 Aug 2007 06:02:27 +0930, Tim wrote:
>>
>>> Andrew Parker:
>>>>> For bash the following will display 061 if its currently a leap year,
>>>>> 060 otherwise
>>>>>
>>>>> date -d "$(date +%Y)/03/01" +%j
>>> Kevin J. Cummings:
>>>> It doesn't work with dates after 2037/03/01 ....
>>> Leaving you with thirty years to develop a solution, or spend a few
>>> minutes pondering whether to bother... ;-)
>>>
>>> But seriously, although some might think you don't need to worry about
>>> such things, there are programs that will need to do some work using a
>>> date from the future. The matter is more urgent than immediately
>>> obvious.
>>>
>> [...]
>>
>> My program deals only with the present and the immediate past.
>> Since in 30 years I hope to celebrate (?) my 98th, it would be
>> quite interesting to see if the problem still concerns me. :)
>>
>> Mike.
>>
>>
> In a terminal type $cal 2 2008 and you will see February has 29 days
> when it is leap year according to Google. Do $cal 2 2007 and you will
> see this:
>
> [karl at k5di ~]$ cal 2 2007
> February 2007
> Su Mo Tu We Th Fr Sa
> 1 2 3
> 4 5 6 7 8 9 10
> 11 12 13 14 15 16 17
> 18 19 20 21 22 23 24
> 25 26 27 28
>
> So no leap year in 2007
>
>
And Cal works after 2037
[rlaing at eagle1 ~]$ cal 2 2039
February 2039
Su Mo Tu We Th Fr Sa
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28
[rlaing at eagle1 ~]$ cal 2 2040
February 2040
Su Mo Tu We Th Fr Sa
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29
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