How to set up the day countdown in the subject line

[kH32323]

I would like to setup the countdown in the subject line, may I know which function should use? 

i am using below syntax , but showing error

{%= dateDiff("d",''currentTime' 00:00:01'','2024-07-31 23:59:59') %}

[SatheeskannaK · Accepted solution]

@kH32323 Try along these lines and format it accordingly,

{% let d=now %}

{% let d1=2024-05-05T10:15:30Z %}

{%= dateDiff(d,d1) %}

[kH32323]

@SatheeskannaK 

thanks for your help is work now