The optimum times to publish on social media depend on a number of factors, including the platform you’re using, your target audience’s demographics, and their online behavior.
However, below are some general tips for best publishing times on big social networking platforms:

Facebook is available weekdays from 9:00 AM to 3:00 PM, with peak activity around lunchtime.1
Thursdays and Fridays have greater engagement rates.
Avoid posting on weekends, as engagement is lower.

2. Instagram:
Instagram hours are 11:00 AM to 1:00 PM weekdays and 7:00 PM to 9:00 PM evenings.
Wednesdays are generally more engaging.
Avoid posting late at night or in the early morning.

Twitter is most active between 9:00 AM and 3:00 PM on weekdays, with peak participation during lunchtime (12:00 PM to 1:00 PM).
Mondays and Tuesdays are historically busier days.
Evenings and weekends are also suitable times for engagement.

4. LinkedIn:
LinkedIn is open weekdays from 10:00 AM to 11:00 AM and 12:00 PM to 1:00 PM.
Tuesday, Wednesday, and Thursday are often the greatest days.
Avoid posting on weekends.

5.  Pinterest:
Pinterest engagement is typically higher on Saturdays and Sundays.
Evenings between 8:00 and 11:00 p.m. can be useful.
Weekdays around lunch and nights can also be productive.

6. YouTube:
YouTube is available weekdays between 12:00 PM and 4:00 PM and 6:00 PM to 9:00 PM.

Thursdays and Fridays may see more engagement.
Avoid posting late at night or in the early morning.
These are basic suggestions, and you should watch your own analytics to identify when your audience is most active and engaged. Consider time zone variances if your audience is distributed across multiple regions. Experimenting with different posting timings and monitoring the outcomes might help you improve your social media strategy for maximum engagement.