The scale's date and time are automatically updated when it connects to your smartphone.
The date and time need to be set before the first use or whenever the batteries are changed.
*credit to Sylvain of iHealth Labs EU
https://helpcenter.ihealthlabs.eu/hc/en-gb/articles/360000007489-iHealth-Lite-HS4S-How-to-set-the-date-and-time