Turn your spreadsheet list with dates into a calendar view. Select the column that contains dates and reformat your sheet into a new sheet in a monthly calendar format. Upgrade to push to a selected Google Calendar™. 

In a sheet in Google Sheets™ have up to 10 column headers. Use the Extensions menu to select "Make Calendar View." Show the sidebar and use the drop down to select which column contains the date to show on the calendar grid. Each column is displayed as a row within the monthly calendar view. Calendar view is created in a new sheet. 

Upgrade for $5 a year to allow you to push the calendar in your spreadsheet to your selected Google Calendar™. Premium features will work when signed into the purchasing account. 
*Note: being signed into multiple accounts can cause a conflict with verifying your purchase. 

Created by Google Developer Expert Alice Keeler. Free features collect NO user data. Premium upgrade checks signed in email address against email in the database, no other data is collected. 

Check out all of AliceKeeler LLC Add-ons at https://alicekeeler.com/codedbyalice