Re: trigger date defined as: date+x days

Paul Pelzl wrote:
> On Fri, Jan 05, 2007 at 12:08:34PM +0000, T E Schmitz wrote:
> 
>>Paul Pelzl wrote:
>>
>>>On Fri, Jan 05, 2007 at 12:05:59AM +0000, T E Schmitz wrote:
>>>
>>>>My event is, say, 180 days after a certain date. So, I want date+180 as 
>>>>my trigger date. How do I express this?
>>>
>>>
>>>If you know the value of "date" ahead of time, then you can enter it as
>>>a date constant which can be used in arithmetic expressions:
>>>
>>>   REM [trigger('2007-01-04' + 180)] MSG 180 days after Jan 4
>>
>>How would I add 3 months?
> 
> 
>    FSET _add_months(d_date, m_int) date(year(d_date), monnum(d_date) + m_int, day(d_date))
>    REM [trigger(_add_months('2007-01-04', 3))] MSG three months after Jan 4
> 
> This is untested, but probably works.  
> 
> idioms.  Usually it's possible to get the reminder you're looking for
> without doing so much work, and I'm starting to wonder if you trying to
> solve a problem the hard way...

As far as the first example (add 180 days) is concerned, I don't think 
so. My mobile PAYG phone has to be used once in 180 days or the credit