batter my heart

For April 3rd:

Batter my heart, three-personed God, for you
As yet but knock, breathe, shine, and seek to mend;
That I may rise, and stand, o'erthrow me, and bend
Your force to break, blow, burn, and make me new.
I, like an usurped town, to another due,
Labour to admit you, but Oh, to no end.
Reason, your viceroy in me, me should defend,
But is captived, and proves weak or untrue.
Yet dearly I love you, and would be loved fain,
But am betrothed unto your enemy:
Divorce me, untie or break that knot again,
Take me to you, imprison me, for I,
Except you enthrall me, never shall be free,
Nor ever chaste, except you ravish me.

~John Donne, Holy Sonnet XIV, affectionately known as the "John Donne is Gay for God" poem.

For April 4th:

Let me not to the marriage of true minds
Admit impediments. Love is not love
Which alters when it alteration finds,
Or bends with the remover to remove:
O no! it is an ever-fixed mark
That looks on tempests and is never shaken;
It is the star to every wandering bark,
Whose worth's unknown, although his height be taken.
Love's not Time's fool, though rosy lips and cheeks
Within his bending sickle's compass come:
Love alters not with his brief hours and weeks,
But bears it out even to the edge of doom.
If this be error and upon me proved,
I never writ, nor no man ever loved.

~William Shakespeare, Sonnet CXVI, which will probably always be my favorite no matter how much I wish my favorite was one of the more obscure ones.