April is "Call Before You Dig Month". 

Did you know failure to contact 811 before digging results in damage to a buried utility once every 6 minutes across the United States? April is National Safe Digging Month! LWP reminds anyone who will be digging to call 811 or contact @Colorado811 before all outdoor digging projects, no matter how large or small.  https://call811.com/before-you-dig/how-811-works