If your dashcam's date and time settings are not properly remembered after the dashcam has been off, the dashcam's battery is probably completely flat. In that case, charge the dashcam for a while, preferably via the mains using a USB adapter for your mobile phone.
If the settings are still not properly remembered after that, the dashcam's battery is probably no longer good. The built-in batteries in dashcams are often very small and over time they lose their capacity. They cannot be replaced either, but you can often still use the dashcam as normal.
Still need help? Contact our support team and include your order number (if applicable), dashcam brand/model, and a photo/video of the issue.