This looks a lot like the thread you started here... https://www.sqlservercentral.com/Forums/1911062/Help-to-reduce-stored-procedure-execution
I'm not sure why anyone would want to continue answering questions for you when you bail out on the...

Itzik Ben-Gan has a function...

http://www.itprotoday.com/microsoft-sql-server/how-compute-date-and-time-difference-parts

Whoever wrote this needs to give back whatever money they were paid... This contains some truly unforgivable sins.
Looking at the top 1/2 of the code, my first thought was...

Here's another options that differs from Jeff's good suggestion...

It's a bit more convoluted than Jeff's suggestion but I offer it up because, in a situation like this, you...

This version should be better for @cnt values over 44 (I also missed the space between the replication values the 1st time).

SET NOCOUNT ON;

DECLARE...

Try this...
SET QUOTED_IDENTIFIER ON;
GO
SET ANSI_NULLS ON;
GO
CREATE PROCEDURE dbo.usp_Align
/* =================================================================================================================================
12/13/2017 JL, Created for forum post: https://www.sqlservercentral.com/Forums/1912528/ALIGNMENT
================================================================================================================================= */
/*
dbo.usp_Align

Can't do proper edit...