Working with Dates older than 1900-01-01

I'm curious about working with old historical dates. Crystal doesn't seem to like working with them as a valid date as far as displaying and working with them in formulas.
For simplicity, instead of using a database I tried a simple one cell input Excel spreadsheet with a combination of dates in it, some prior to 1900-01-01. The newer dates display fine, the older dates (any 1899 and before) display as blank. As well, they don't return expected results when used in formulas doing < or > comparisons to more current dates.
What's the best work-around if a person should need to create a reports with historical data containing pre-1900 dates?
Thanks! Russ.

Hi Russ,
To clarify, is this issue happening with Excel as a datasource or within Crystal Reports as well? I've found articles specific to Excel where it considers 1900-01-01 as a leap year.
I have also tested this in Crystal Reports by creating a formula:
date(1900/01/01)
Regards,
Wallie
Edited by: Wallie Cheng on Sep 24, 2008 1:15 AM
Actually my syntax was incorrect. Crystal Reports displays the date correctly with the date formatted as 1900,1,1

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I am working with dates.
1st I want to calculate a time span for example calculate cell A2 - cell A1. In cell A1 it is written 01.01.2010 (so first of January) and in cell A2 01.02.2010 (so first of February). I wrote the dates in letters, too, to avoid misunderstandings due to different national date formats.
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B2: Jan 1, 2010
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D2: =C2-B2
E2: =3*D2
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Path: /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
Identifier:            com.apple.finder
Build Info: Finder_FE-932001003000000~1
Responsible:           Finder [4626]
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PlugIn Identifier:       com.apple.finder
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-3 sec                         CODE SIGNING: process 4622[Finder]: rejecting invalid page at address 0x10f4bd000 from offset 0x3f000 in file "" (cs_mtime:0.0 == mtime:0.0) (signed:0 validated:1 tainted:1 wpmapped:0 slid:0)
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--> __TEXT 000000010c966000-000000010ce55000 [ 5052K] r-x/rwx SM=COW /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
    __DATA 000000010ce55000-000000010cf53000 [ 1016K] rw-/rwx SM=COW /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
0   com.apple.finder                                 0x000000010c9a521f 0x10c966000 + 258591
10 com.apple.finder                               0x000000010c9977b5 0x10c966000 + 202677
11 com.apple.finder                               0x000000010c988154 0x10c966000 + 139604
12 com.apple.finder                               0x000000010c987e15 0x10c966000 + 138773
13 com.apple.finder                               0x000000010c987d35 0x10c966000 + 138549
14 com.apple.finder                               0x000000010c987cfd 0x10c966000 + 138493
28 com.apple.finder                               0x000000010c96b960 0x10c966000 + 22880
1   com.apple.finder                                 0x000000010c98a69d 0x10c966000 + 149149
2   com.apple.finder                                 0x000000010c98aba7 0x10c966000 + 150439
3   com.apple.finder                                 0x000000010c9795d2 0x10c966000 + 79314
4   com.apple.finder                                 0x000000010c98aa0b 0x10c966000 + 150027
5   com.apple.finder                                 0x000000010c98a952 0x10c966000 + 149842
6   com.apple.finder                                 0x000000010c98a78a 0x10c966000 + 149386
7   com.apple.finder                                 0x000000010c979496 0x10c966000 + 78998
8   com.apple.finder                                 0x000000010c98a548 0x10c966000 + 148808
9   com.apple.finder                                 0x000000010c98a410 0x10c966000 + 148496
10 com.apple.finder                               0x000000010c983df6 0x10c966000 + 122358
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David

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