A Eurozone Timeline by Fith

Fitch constructed a timeline for the Eurozone with key events for the European Debt Crisis:

http://ftalphaville.ft.com/blog/2011/02/16/489796/a-eurozone-timeline-by-fitch/

For April:

• Portugal: EUR4.5bn medium‐ and long‐term (MLT) notes falling due.
• Spain: EUR15.5bn MLT notes falling due

Also check this site for dates beyond 2011:

Latiza