How to create a one column anniversary view

[std_anniversary filter="tax::departments::is::executive;"]
President
November 9
1 Year
Assistant
January 28
6 Years
President
January 21
6 Years
Vice President
December 19
18 Years

How to create a one-column anniversary view

<style>
#onecolumn .row{
flex-direction: column !important;
}
</style>
<div id="onecolumn" style="padding:40px 0">
[std_anniversary filter="tax::departments::is::executive;"]
</div>

President
November 9
1 Year
Assistant
January 28
6 Years
President
January 21
6 Years
Vice President
December 19
18 Years