[dcphp-dev] Repeating pattern incongruent to any calendar increment

I'm trying to think of a better means of determining a set of values for "today" based on a repeating pattern.

I have this schedule that follows a repeating pattern of blocks of 70 days (10 weeks). 70 doesn't map to anything useful in a calendar year, and there is no logical way I see of deriving today's schedule from the date without a fixed reference in history. I can take an arbitrary historical date and assign it a position within the 70-day pattern, then query and calculate the series of schedules in contemporary time from start date to end date, but that seems frivolous to reference a date that far into history.

Alternatively, I could calculate and cache a set of reference points (position 1 in every block of 70, e.g.) and compare today's date to select the date closest to today's date and advance the pattern from there.

Perhaps I'm thinking about this wrong though. Is there a numerical date system (for example, today's date might be day 12873461 from a fixed point in history) where I could simply divide by 70 and grab the remainder? Then, use the date function to convert that number into an EST date stamp?

Thanks,

Anthony

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