DATE_REGEX
private val DATE_REGEX: String = "\b(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[0-2])/\d{4}(\s+([01]?[0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9])?\b"
DATE_REGEX regex to validate the date
values