# Reply To: Can specific 2-week periods be set in the resource usage view timescale?

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#410057

Tim,
I’ve played with this several times and I don’t think we have any control over how MS Project displays the 2 week time periods.
What I can tell you is that Project, like other MS products, appears to store their date values as a number value, starting with 1/1/1900, which is date is a value of 1. 12/31/1900 is a value of 365 and so on. So the value of 365 means it’s the 365th day since 1/1/1900.

I set up my timescale for Weekly with 2 week intervals.
The earliest a project can start is 1/1/1984 so I moved my timeline to that date and the first two week time period I see is 1/8/1984. (not 1/1/1984)

Looking at the table below, I entered sets of dates (D1 and D2), subtracted the dates (D2-D1) to determine the date value number, and then divided that day number by 14 (two week periods). Looking at the 2nd row, the date of 1/1/1984 converts to a value of 2191.5, the “.5” meaning it’s halfway thru a 2 week period. Looking at the next row, with a D2 value of 1/8/1984 this equates to the 2192nd 2 week period, which is the first full two week period of 1984 and hence, it’s the first full two week time period project will display on the timescale.
So in summary, the time periods are 14 day increments from 1/1/1900.
Hopefully, this helps explain how Project arrives at it’s two week intervals.

D1 D2 D2 – D1 Divided by 14
01/01/1900 12/31/1900 365
01/01/1900 01/01/1984 30681 2191.5
01/01/1900 01/08/1984 30688 2192
01/01/1900 04/02/2017 42826 3059
01/01/1900 04/09/2017 42833 3059.5

The only suggestion I can offer to help resolve your issue is to potentially re-align your two week intervals to the MS Project intervals, which we can’t configure. For example, the next time reporting period would be one week, then back to 2 weeks from then on.
Hope that helps.