After 1564 (when Shakespeare was born) and before 1609, when it was published.
Lookng at a past literature exam the date referenced on that was 1968 - but i cannot be 100% sure of that. It would be an appropriate age for her to write it, so it appears to be a valid answer.
A shakesperean sonnet is written in ababcdcdefefgg form. If that helps
they were written about love for people in love bacically a love poem!!
it was written in1814.