JavaScript - FetchXML - GetDate

Hi,

I am fetching data from the Entity using FetchXML - JavaScript, the thing is that I also wanna fetch todays date. Whatsoever is the best approach can be adopted any of following with max candidature will do,

SYSDATETIME()
    ,SYSDATETIMEOFFSET()
    ,SYSUTCDATETIME()
    ,CURRENT_TIMESTAMP
    ,GETDATE()
    ,GETUTCDATE();  

Thanks and Regards,

Rk_Hirpara