When sending user attributes to UserGuiding, a common use case is to send dates, such as sign-up, subscription and cancellation date, and many others.
With these attributes, you could display a Promoter Survey to users who subscribed two weeks ago or show a Guide to newly subscribed users, for example.
Please use one of the following formats when sending dates as user attributes.
//Sends date in YYYY/MM/DD format (most recommended since it is a
subscribed_at : "2022/01/25"
//Sends date in Unix Epoch format (milliseconds)
//Sends date in ISO format (there needs to be 'T' between date and time)
//or without milliseconds/timezone