The built-in date format (<<now>>) and filter operators only work with 
dates after 1900. So this this might be a good case for making your own 
date fields with yyyy-mm-dd format which can then be sorted sanely and used 
with the compare operator.

On Tuesday, July 14, 2020 at 7:42:02 PM UTC-7, Scott Kingery wrote:
>
> Tony, thanks for your thoughts and tips as always. I think I'll just start 
> an empty wiki and see where things lead using these idea.
>
> On Tue, Jul 14, 2020 at 7:00 PM TW Tones <> wrote:
>
>> Scott,
>>
>> I have not developed any historical tiddlywiki's but I have spent a lot 
>> of time in personal organisers. From this I have a set of key methods I 
>> use. I will dump a few here which we can explore further.
>>
>>    - Yes, set dates in custom date fields and have at least start and 
>>    end dates, 
>>    - Keep created and Modified to mean what they mean, created the 
>>    tiddler and modified the tiddler - this is useful information don't 
>>    compromise your future by changing their meaning
>>    - if both dates are the same consider it a mile stone
>>    - If their is not end date then it marks a new era that has note close
>>    - If it has no start date we are not sure when it started
>>    - Add another date field perhaps for recognised dates
>>    - You could use a plugin like http://kixam.github.io/TW5-datePicker/ 
>> however 
>>    more for this century (needs moment.js plugin as well see notes)
>>    - Allow dates to be entered manually as well as selected from the list
>>    - Keep as many dates as possible compatible with tiddlywiki's date 
>>    serial number, even f you zero fill the rest of the serial number
>>       - This allows you to continue to use operators and sort etc..
>>    - There is at least one visual timeline tool eg 
>>    http://emkayonline.github.io/tw5visjs/
>>    - A lot of the people pursuing genealogical tiddlywiki's need dates 
>>    and some very old dates so maps to historical records. 
>>
>> If you are taking records that become history there are more tricks
>>
>> Regards
>> Tony
>>
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