As Number (AS NUMBER) operator

The AS NUMBER (or AS NUM, or AS INT, or AS INTEGER) operator is used to cast an operand to a number. Depending on the type of operand, the casting will work as:

operand type	Rule
String	If the string is a decimal number, will return that number, otherwise, will return empty
Boolean	If the operand is true, will return 1, if it’s false will return 0.
Date	Will return the number of seconds since Unix epoch.
Number	Will return the value as is.
List	Will return the number of elements in the list
Class	Will return the number of fields in the class
Path	Will return empty
Empty	Will return Empty

For example:

findit -d 'file: `path` modified at: `modified` 1 day before modification was `((modified AS NUMBER) - 1 * 60 * 60 * 24) AS DATE`'

Will show all the files and the day before they had been modified