Move a date forward or backward in time based on the simple adjustment expression.
Parameters
date: Date
Valid date object
adjustmentExpression: string
An series of date adjustment values in the format (+|-)(integer) (unit), such as "+1 year", "-1 month -12 hours". Supported units: year, month, day, hour, minute, second. Units may be in singular or plural form.
Move a date forward or backward in time based on the simple adjustment expression.