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POWhat datetime format is this?
 

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  1. POWhat datetime format is this?
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    <p>I have DateTime structure for an old data format that I don't have access to any specs for. There is a field which indicates the datetime of the the data, but it isn't in any format I recognize. It appears to be stored as a 32-bit integer, that increments by 20 for each day. Has anyone ever run across something like this?</p> <p>EDIT:</p> <p>Example: 1088631936 DEC = 80 34 E3 40 00 00 00 00 HEX = 09/07/2007</p> <p>EDIT:</p> <p>First off, sorry for the delay. I had hoped to do stuff over the weekend, but was unable to.</p> <p>Second, this date format is weirder than I initially thought. It appears to be some sort of exponential or logarithmic method, as the dates do not change at an increasing rate.</p> <p>Third, the defunct app that I have for interpreting these values only shows the date portion, so I don't know what the time portion is.</p> <p>Example data: (Hex values are big-endian, dates are mm/dd/yyyy)</p> <p>0x40000000 = 01/01/1900<br> 0x40010000 = 01/01/1900<br> 0x40020000 = 01/01/1900<br> 0x40030000 = 01/01/1900<br> 0x40040000 = 01/01/1900<br> 0x40050000 = 01/01/1900<br> 0x40060000 = 01/01/1900<br> 0x40070000 = 01/01/1900<br> 0x40080000 = 01/02/1900<br> 0x40090000 = 01/02/1900<br> 0x400A0000 = 01/02/1900<br> 0x400B0000 = 01/02/1900<br> 0x400C0000 = 01/02/1900<br> 0x400D0000 = 01/02/1900<br> 0x400E0000 = 01/02/1900<br> 0x400F0000 = 01/02/1900<br> 0x40100000 = 01/03/1900<br> 0x40110000 = 01/03/1900<br> 0x40120000 = 01/03/1900<br> 0x40130000 = 01/03/1900<br> 0x40140000 = 01/04/1900<br> 0x40150000 = 01/04/1900<br> 0x40160000 = 01/04/1900<br> 0x40170000 = 01/04/1900<br> 0x40180000 = 01/05/1900<br> 0x40190000 = 01/05/1900<br> 0x401A0000 = 01/05/1900<br> 0x401B0000 = 01/05/1900<br> 0x401C0000 = 01/06/1900<br> 0x401D0000 = 01/06/1900<br> 0x401E0000 = 01/06/1900<br> 0x401F0000 = 01/06/1900<br> 0x40200000 = 01/07/1900<br> 0x40210000 = 01/07/1900<br> 0x40220000 = 01/08/1900<br> 0x40230000 = 01/08/1900<br> ....<br> 0x40800000 = 05/26/1901<br> 0x40810000 = 06/27/1901<br> 0x40820000 = 07/29/1901<br> ....<br> 0x40D00000 = 11/08/1944<br> 0x40D10000 = 08/29/1947<br></p> <p>EDIT: I finally figured this out, but since I've already given up the points for the bounty, I'll hold off on the solution in case anyone wants to give it a shot.</p> <p>BTW, there is no time component to this, it is purely for storing dates.</p>
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    1. CODo you know *anything* about the data format, such as the name of an associated program?
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      1. USJon Skeet
    2. COOr maybe include an example?
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      1. USSean Bright
    3. COSorry, your example doesn't make any sense to me. Whar do you mean by "DEC =" and "OCT =" and why do they "equal" different types?
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