Short Term Memory Loss

You forget everything in a day, except basic skills and things that are extremely important to you. In order to recall things from a day or more ago you have to make a memory check, with a DC that gradually increases as the time since the memory was made increases. DC is decided by DM. But if the memory is related to something important to you, whether it be a skill, person, or item, you roll with advantage on memory. If the memory is directly about the important thing, then you needn’t even roll, you can recall with perfect detail.