Engagement on your posts can depend greatly on the time and day that you are posting - test and evaluate the best times of the day to post to your audience.
However, as a general guideline you can use the below:
Motivational/Inspiration content – should be shared in the morning when people often need a little push to get them going.
Educational content – It’s shown by various studies that people are open to learning new things in the afternoon. Therefore, it may be a good time to share those articles from your blog!
Promotional content – people tend to take their wallets out in the evening. Therefore, we would suggest sharing posts to your opt-in pages/sales pages during the evening.