You may need the latest release of the FREE PREMIUM EDITION to change the CSS.

In the file calendar.css in wp-content/themes-ai1ec/umbra (or whatever theme you are using)/css/

Easiest way to find the code is to search (Ctrl + F  keys on keyboard) for “.ai1ec-posterboard-view .ai1ec-date-block-wrap”

change the filter: alpha(opacity=7);

to filter: alpha(opacity=50);


.ai1ec-posterboard-view .ai1ec-date-block-wrap {

float: right;
margin: 0 0 0.5em 0.5em;
background: #5e8cba;;
text-align: center;
color: #FFFFFF;
opacity: 0.7;
-moz-opacity: 0.7;
filter: alpha(opacity=50); /*CHANGE THIS NUMBER FROM 7 TO 50*/
-webkit-transition: 0.2s all ease-out;
-moz-transition: 0.2s all ease-out;
-ms-transition: 0.2s all ease-out;
-o-transition: 0.2s all ease-out;
transition: 0.2s all ease-out;
-webkit-transform: translatez(0);


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