Difference between LC on Mac and LC server

[jbv at souslelogo.com]

Hi list

When I run the following code on my Mac (LC community 6.5.2) :
   get "04/17/2016"
   convert it to seconds
   put it

I get 1460844000

When I run the same code on LC server (on-rev account) I get
1460840400

Any idea wht there's a difference ?

Thanks
jbv