Should Sixteenth Century Be Capitalized?
Specific Periods, Eras, Historical Events, Etc. : These Should All Be Capitalized as Proper Nouns. .. . However, Centuries—and the Numbers Before Them—Are Not...
Specific periods, eras, historical events, etc.: these should all be capitalized as proper nouns. ... However, centuries—and the numbers before them—are not capitalized. See the examples below for an illustration of this rule: In the fifteenth and sixteenth centuries , England blossomed into an empire.
Do you write out twentieth century?
Use 1990s (not 1990's unless possessive or to clarify meaning). Nineteenth century, twentieth century; do not use 19th century, 20th century. Spell out numbers one through ten (one, two, etc.). ... Significant round numbers (fifty, thousand) may be written out.
Do you capitalize time?
8 Capitalize Time Periods and Events (Sometimes)
Specific periods, eras, and historical events that have proper names should be capitalized.