convert date in terms of numeric series back to date

[coloful_architect]

I have a created variable; see below;

24250 seems a October. 

but any one knows what is the date format for that?

my two questions regarding this

1. How I can convert this series number to date format

2. May I deploy a formula rather than inputting a hard code there?

Thanks 

[Chanty4u · Accepted solution]

you can try this way

=date(date#(DateField,'yyyymmdd'),'yyyymmdd')  

and have a look here

https://community.qlik.com/t5/New-to-QlikView/convert-integer-column-into-date/m-p/1252234

[coloful_architect]

Thanks. It turns out that 24250 is after a process of calculation. 

your formula is helpful. thanks