Here are the dates extracted from the paragraph, presented in various formats:

**Verbatim**
- January 1, 1901 (MCMI)
- December 31, 2000 (MM)

**Full date**
- January 1, 1901
- December 31, 2000

**All-numeric (MM/DD/YYYY)**
- 01/01/1901
- 12/31/2000

**All-numeric (DD/MM/YYYY)**
- 01/01/1901
- 31/12/2000

It should be noted that both variants of the all-numeric notation are often shortened to include only the last two digits for the year instead of four, however, considering that the leading digits for representing the year in this paragraph vary from one another, doing so might be inappropriate, as it can lead to the loss of significant information.

Lastly, here are the standalone extractions of year notations represented with Roman numerals:
- MCMI
- MM

Standalone, they are not dates, per se, but they can be combined with a day and a month to become one.
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