Is there any feature in sales force that can automate posting on chatter January every year?. I tried using workflow and process but the only available schedule is Days/hrs.
One possible solution using process builder that I can think of is that you can create a 'Date/Time' field say 'PostonChatterDate' on the Opportunity. Now the date and time value of 'PostonChatterDate' field should be updated first, say to 1st Jan/2018 00:00:00. Then from process builder under schedule actions we can set action firing time to '1 Hour After PostonChatterDate' and add action 'Post on Chatter'. Set the entry criteria as needed.