SQL Date Range between a week by week range - sql-server

Question

we are making a date range picker for employee vacations
for example i will user January 2016 as an example and our system goes from sunday through saturday
if an employee takes a vacation from January 14-20 they should be in the date range 10-16 and also 17-23
I just cant think of how to write an sql query that will limit it to those 2 dates.
What i have is:
DECLARE #WeekRangeStart DATETIME ='2016/01/10';
DECLARE #WeekRangeEnd DATETIME = '2016/01/16';
SELECT [ID],
[EmpName],
[EmpType]
FROM Vacations
WHERE VacationStartDate >= #WeekRangeStart OR VacationEndDate >= #WeekRangeStart
--OUTPUT
--ALL DAYS BEFORE THIS WOULD BE TRUE...
--1/14/2016 >= 1/10/2016 TRUE
--1/20/2016 >= 1/10/2016 TRUE
-- NEXT WEEK
--1/14/2016 >= 1/17/2016 FALSE
--1/20/2016 >= 1/17/2016 TRUE
-- NEXT WEEK
--1/14/2016 >= 1/24/2016 FALSE
--1/20/2016 >= 1/24/2016 FALSE
--ALL DAYS AFTER THIS DAY WOULD BE FALSE...
but this only works for for a things that have passed, But if i were to book a day in march i would always show on the schedules because my startdate would greater than today. How should i go about limiting it to that range only?

Answer 1

DECLARE #WeekRangeStart DATETIME ='2016/01/10';
DECLARE #WeekRangeEnd DATETIME = '2016/01/16';
SELECT [ID],
[EmpName],
[EmpType]
FROM Vacations
WHERE VacationStartDate between #WeekRangeStart and #WeekRangeEnd
or VacationEndDate Between #WeekRangeStart and #WeekRangeEnd

Answer 2

This might be useful. Using a recursive CTE I got all the dates the vacations spans. Then return the weeks it spans based on the week ranges provided.
DECLARE #WeekRangeStart DATETIME ='2016/01/10';
DECLARE #WeekRangeEnd DATETIME = '2016/01/16';
DECLARE #VacationStartDate DATETIME = '2016-01-14'
DECLARE #VacationEndDate DATETIME = '2016-01-20'
;WITH cte AS
(
SELECT #VacationStartDate AS Dates
UNION ALL
SELECT DATEADD(dd, 1, dates)
FROM cte
WHERE dates < #VacationEndDate
)
SELECT DISTINCT
DATEADD(dd, -(DATEPART(dw, dates)-1), dates) AS WeekStartDate,
DATEADD(dd, 7-(DATEPART(dw, dates)), dates) AS WeekEndDate
FROM cte
WHERE dates BETWEEN #WeekRangeStart AND #WeekRangeEnd