Look in thy glass and tell the face thou viewest
Now is the time that face should form another;
Whose fresh repair if now thou not renewest
Thou dost beguile the world, unbless some mother
For where is she so fair whose uneared womb
Disdains the tillage of thy husbandry?
Or who is he so fond will be the tomb
Of his self-love, to stop posterity?
Thou art thy mother's glass and she in thee
Calls back the lovely April of her prime;
So thou through windows of thine age shalt see
Despite of wrinkles, this thy golden time
But if thou live, remembered not to be
Remembering the springtimes of her life when she was at her most beautiful … April was the beginning of Spring, and was thought to be the most colourful of the months. It is also the season of germination and re-generation, appropriately the renewal of life. 

Sonnet 3