defines a set of strings used for weeks and months' names in the string format
window.dhx.dateStrings = { en: { monthFullName: ["January","February","March","April","May","June","July", "August","September","October","November","December"], monthShortName: ["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug", "Sep","Oct","Nov","Dec"], dayFullName: ["Sunday","Monday","Tuesday","Wednesday","Thursday", "Friday","Saturday"], dayShortName: ["Su","Mo","Tu","We","Th","Fr","Sa"] } };