Glamorgan and Yorkshire will kick off the summer's Second XI fixtures after they were announced by ECB.
The teams will meet in a Second XI Trophy game at the SWALEC Stadium on Tuesday 8 April before doing battle in a three-day championship match at the same venue 24 hours later.
Second XI Trophy holders Lancashire will begin the defence of their one-day crown when they host Leicestershire on May 19.
The Red Rose county were denied the double last year when rain ruined their Championship final with Middlesex.
Click on the link below for the full fixture list.