Magento Open Source 2.2.x
Special Price

A special price can be offered during a period of time as a Scheduled Update. During the specified time period, the special price appears instead of the regular price, followed by “was (previous price).”

Special Price

To apply a special price:

1. Open the product in edit mode. Then, do the following:
a. Scroll down to the Price field, and click Advanced Pricing. Then, enter the amount of the Special Price.
b. Use the Calendar () to choose the Start Date and End Date for the special price promotion.

The special price goes into effect immediately after midnight at the beginning of the start date (00:01), and continues until just before midnight (23:59) on the day before the end date.

Special Pricing Settings
2. When complete, tap  Done . Then, tap Save.