As promised, here are some top Product Hunt tips. These tips are further divided into categories based on available time.
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Pick a deadline and make sure that it's not a holiday in the US as the Product Hunt gets maximum traffic from the US. (23.63% according to SimilarWeb)
Tuesday, Wednesday & Thursday get more competition than other weekdays (Monday & Friday) whereas weekends have even lesser competition (Saturday & Sunday).
P.S. Image taken from Hackernoon

What's your Product Hunt launch goal?
OR
For the 1st goal, launch on weekends.
For the 2nd goal, launch on Wednesday or Thursday.