Thank you for using Syncfusion products.
We would like to let you know that, DateFormat property is used to denote the format of the date that used in the database. So we request you to provide the corresponding date format in the DateFormat property with the format of the Start date and End date values in the database. Please refer the below code snippets for more details.
.DateFormat("dd/MM/yyyy") // This date format must match the date format in the datasource
We have also prepared a sample based on this with date format as “dd/MM/yyyy” and you can find the sample under the following location.
Please let us know if you require further assistance on this.
We regret for the inconvenience caused.
We were able to reproduce the issue and we have confirmed this as bug and logged a report on this. Also we have created a support incident under your account to track the status of this issue.
Please log on to our support website to check for further updates.
Please let me know if you have any questions.