Convert SQL Query with Variables to DAX Query

Could someone please help me in converting this working SQL Query to a DAX Query?

SELECT [ProductNumber],
       CASE
           WHEN @StartDate BETWEEN [StartDate] AND [EndDate] THEN @StartDate
           WHEN @StartDate < [StartDate] THEN [StartDate]
       END AS [StartDate],
       CASE
           WHEN @EndDate BETWEEN [StartDate] AND [EndDate] THEN @EndDate
           WHEN @EndDate > [EndDate] THEN [EndDate]
       END AS [EndDate], 
       [PromoCode], 
       [DaysAvailableInWeek]
FROM [#Promos]
WHERE [StartDate] <= @EndDate
  AND [EndDate]   >= @StartDate
ORDER BY 1;

DDL:

CREATE TABLE [#Promos]
([ProductNumber]       INT, 
 [StartDate]           DATE, 
 [EndDate]             DATE, 
 [PromoCode]           VARCHAR(6), 
 [DaysAvailableInWeek] VARCHAR(20)
);

DML:

INSERT INTO [#Promos] ([ProductNumber], [StartDate], [EndDate], [PromoCode], [DaysAvailableInWeek])
VALUES (6512, '2020-01-11', '2020-01-13', 'ABC123', '1, 3, 5');
INSERT INTO [#Promos] ([ProductNumber], [StartDate], [EndDate], [PromoCode], [DaysAvailableInWeek])
VALUES(6514, '2020-01-12', '2020-01-14', 'ABC123', '4, 6');
INSERT INTO [#Promos] ([ProductNumber], [StartDate], [EndDate], [PromoCode], [DaysAvailableInWeek])
VALUES(2341, '2020-01-11', '2020-01-25', '321XYZ', '1, 2');

Here is what I tried so far, but it doesn't return correct results. 

EVALUATE SUMMARIZECOLUMNS(
'Dim_Promos'[PromoCode], 
'Dim_Product'[ProductNumber], 
'Dim_Date_Start'[FullDate], 
'Dim_Date_End'[FullDate], 
FILTER('Dim_Date_Start', 'Dim_Date_Start'[FullDate] <= DATE(2020, 01, 15) ), 
FILTER('Dim_Date_End', 'Dim_Date_End'[FullDate] >= DATE(2019, 04, 11) ),
"Days Available In Week", [Days Available In Week])

Also, I would need the date formatted as YYYY-MM-DD. When I tried the FORMAT function, it is throwing syntax error.

FORMAT('Dim_Date_Start'[FullDate], "YYYY-MM-DD"), 
FORMAT('Dim_Date_End'[FullDate], "YYYY-MM-DD")

Thanks!