Hello,
Here, the start if the week is 1st of Jan which is "Sunday". How can we set the week start day as Monday for Gantt Chart View.
The Gantt Chart component uses the "locale" property to determine the first day of week: https://api.daypilot.org/daypilot-gantt-locale/
You can use one of the built-in locales or create your own. See also: https://api.daypilot.org/daypilot-locale-class/
In the latest sandbox build (2023.1.5514+) it is now also possible to set the first day of week directly using the "weekStarts" property: https://api.daypilot.org/daypilot-gantt-weekstarts/