diff --git a/erpnext/hr/doctype/leave_application/leave_application.py b/erpnext/hr/doctype/leave_application/leave_application.py
index a51e2b5315..c6a92cad33 100755
--- a/erpnext/hr/doctype/leave_application/leave_application.py
+++ b/erpnext/hr/doctype/leave_application/leave_application.py
@@ -408,13 +408,13 @@ def add_leaves(events, start, end, match_conditions=None):
 	query = """select name, from_date, to_date, employee_name, half_day,
 		status, employee, docstatus
 		from `tabLeave Application` where
-		(from_date between %s and %s or to_date between %s and %s)
+		from_date <= %(end)s and to_date >= %(start)s <= to_date
 		and docstatus < 2
 		and status!="Rejected" """
 	if match_conditions:
 		query += " and " + match_conditions
 
-	for d in frappe.db.sql(query, (start, end, start, end), as_dict=True):
+	for d in frappe.db.sql(query, {"start":start, "end": end}, as_dict=True):
 		e = {
 			"name": d.name,
 			"doctype": "Leave Application",
diff --git a/erpnext/manufacturing/doctype/production_order/production_order.py b/erpnext/manufacturing/doctype/production_order/production_order.py
index 3934935206..7d0405b1dd 100644
--- a/erpnext/manufacturing/doctype/production_order/production_order.py
+++ b/erpnext/manufacturing/doctype/production_order/production_order.py
@@ -523,9 +523,9 @@ def get_events(start, end, filters=None):
 		planned_end_date, status
 		from `tabProduction Order`
 		where ((ifnull(planned_start_date, '0000-00-00')!= '0000-00-00') \
-				and (planned_start_date between %(start)s and %(end)s) \
-			or ((ifnull(planned_start_date, '0000-00-00')!= '0000-00-00') \
-				and planned_end_date between %(start)s and %(end)s)) {conditions}
+				and (planned_start_date <= %(end)s) \
+			and ((ifnull(planned_start_date, '0000-00-00')!= '0000-00-00') \
+				and planned_end_date >= %(start)s)) {conditions}
 		""".format(conditions=conditions), {
 			"start": start,
 			"end": end
diff --git a/erpnext/projects/doctype/task/task.py b/erpnext/projects/doctype/task/task.py
index a9b48fc070..0ae2f8b945 100644
--- a/erpnext/projects/doctype/task/task.py
+++ b/erpnext/projects/doctype/task/task.py
@@ -133,9 +133,9 @@ def get_events(start, end, filters=None):
 	data = frappe.db.sql("""select name, exp_start_date, exp_end_date,
 		subject, status, project from `tabTask`
 		where ((ifnull(exp_start_date, '0000-00-00')!= '0000-00-00') \
-				and (exp_start_date between %(start)s and %(end)s) \
-			or ((ifnull(exp_start_date, '0000-00-00')!= '0000-00-00') \
-				and exp_end_date between %(start)s and %(end)s))
+				and (exp_start_date <= %(end)s) \
+			or ((ifnull(exp_end_date, '0000-00-00')!= '0000-00-00') \
+				and exp_end_date >= %(start)s))
 		{conditions}""".format(conditions=conditions), {
 			"start": start,
 			"end": end
diff --git a/erpnext/projects/doctype/timesheet/timesheet.py b/erpnext/projects/doctype/timesheet/timesheet.py
index 02e5f18f84..6e26212332 100644
--- a/erpnext/projects/doctype/timesheet/timesheet.py
+++ b/erpnext/projects/doctype/timesheet/timesheet.py
@@ -362,7 +362,7 @@ def get_events(start, end, filters=None):
 		from `tabTimesheet Detail`, `tabTimesheet` 
 		where `tabTimesheet Detail`.parent = `tabTimesheet`.name 
 			and `tabTimesheet`.docstatus < 2 
-			and (from_time between %(start)s and %(end)s) {conditions} {match_cond}
+			and (from_time <= %(end)s and to_time >= %(start)s) {conditions} {match_cond}
 		""".format(conditions=conditions, match_cond = get_match_cond('Timesheet')), 
 		{
 			"start": start,
diff --git a/erpnext/projects/doctype/timesheet/timesheet_calendar.js b/erpnext/projects/doctype/timesheet/timesheet_calendar.js
index ad81de65cd..b22cd09f7f 100644
--- a/erpnext/projects/doctype/timesheet/timesheet_calendar.js
+++ b/erpnext/projects/doctype/timesheet/timesheet_calendar.js
@@ -29,4 +29,4 @@ frappe.views.calendar["Timesheet"] = {
 		}
 	],
 	get_events_method: "erpnext.projects.doctype.timesheet.timesheet.get_events"
-}
\ No newline at end of file
+}