What are the dates of 'old' 'middle' 'early modern' and 'modern' English?

Answer:
Depending on the author and his purpose, generally, Old English or Anglo-Saxon (circa 450-1066 CE). Middle English (circa 1066-1450 AD). Early Modern English from about the time of Shakespeare, and Modern English...now!!!
First answer by Mycroft414. Last edit by Mycroft414. Contributor trust: 229 [recommend contributor recommended]. Question popularity: 2 [recommend question].