On Thursday November 29 2007, Mojca Miklavec wrote:

On Nov 27, 2007 5:49 PM, Bart Wise wrote:

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LaTeX has a package called datenumber. It basically allows you to several things:

1) convert a date into a number,

What number? What's the input and what's the output?

First you set the date: \setdatenumber{year}{month}{day} Example: \setdatenumber{2007}{1}{5} Internally, this sets a counter called datenumber. You print the date with \datedate. Then, to increment by a week, you would add 7 to the datenumber and set the date as follows: \addtocounter{datenumber}{7} \setdatebynumber{\thedatenumber} I made a function that increments the date: \def\IncDate{% \addtocounter{datenumber}{7}% \setdatebynumber{\thedatenumber}% }% Then, I created a table with the first column entries as follows: \datedate\IncDate \datedate\IncDate \datedate\IncDate \datedate\IncDate \datedate\IncDate ... The output would be: Friday, 5 January, 2007 Friday, 12 January, 2007 Friday, 19 January, 2007 Friday, 26 January, 2007 Friday, 2 February, 2007 This way I do not have to put in anything except the first date and dates for the whole year are calculated and printed for me.

...

2) add and subtract from that number, in essence adding and subtracting days, and

3) converting a date number into a date string.

The manual mentions this example \date[d=17,m=11,y=2007][weekday,month,day,{, },year]

or simply \date[y=2007,m=11,d=27] or \currentdate

As best as I can tell, this only sets the date. I can see of no way to add a given number of days to calculate a new date.

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I use this package to create a yearly lesson schedule and various other similiar things. However, I have spent a considerable amount of time trying to find the same functionality in ConTeXt with no avail. Is there a solution for this?

There are quite some macros in tex/context/base/core-con.tex (& core-con.mkii) devoted to that. I didn't play with substraction yet, but I bet there is some simple way to do it.

I looked through the source code of core-con.mkii, core-con.mkiv and core-con.tex. I don't see the functionality I need already constructed. I was hoping that an existing solution existed without the need for creating new code.

Mojca

Thanks for you help. If I overlooked something, let me know. Bart