You might be interested in these PCFs
Date Range Picker
A control to manage dates, pick a start and end date with times on a two-month calendar.
Date Range Control
A control to replace two date attributes (like Start/End Date or From/To Date) into one.
Current Date Time PCF
A control to insert the current system date time in a date and/or date time field
DateTimePicker
A control that provides a clean and modern calendar popup for selecting dates and times.

