Is it possible to use Ampscript to print a SET value inside a set value

Question

I am using some AMPScript to SET specific subject lines based on certain date ranges

I have SET the @Subject to include the @month value but the output is not displaying correctly

%%[
Set @month = DatePart(NOW(), 'month')
IF (@month == 11 AND @day > 1) or (@month == 1 AND @day < 31)
        THEN
        SET @Subject= 'Test 1 %%=v(@month)=%% ABC'
        ELSE
        SET @Subject= 'Test 2 %%=v(@month)=%% DEF'
ENDIF]%%

The month variable is not pulling through so I am getting the following output Test 1 %%=v(@month)=%% ABC instead of Test 1 11 ABC

The solution I am using is to have two separate subject lines and printing all three variables separately

eg. %%=v(@SubjectA)=%% %%=v(@month)=%% %%=v(@SubjectB)=%%

using this code

%%[
Set @month = DatePart(NOW(), 'month')
IF (@month == 11 AND @day > 1) or (@month == 1 AND @day < 31)
        THEN
        SET @SubjectA= 'Test 1'
        ELSE
        SET @SubjectA= 'Test 2'
ENDIF]%%
%%[
Set @month = DatePart(NOW(), 'month')
IF (@month == 11 AND @day > 1) or (@month == 1 AND @day < 31)
        THEN
        SET @SubjectB= 'Test 3'
        ELSE
        SET @SubjectB= 'Test 4'
ENDIF]%%

The above does the job but it is really unclean and I am not sure if I am missing something.

Any help is greatly appreciated.

Cheers

Answer 1

Hope below is what you are trying to achieve!

%%[
Set @month = DatePart(NOW(), 'month')
SET @day = Datepart(Now(),'day')
IF (@month == 11 AND @day > 1) or (@month == 11 AND @day < 31)
       THEN
       SET @Subject= Concat('Test 1 ',@month,' ABC')
       ELSE
       SET @Subject= Concat('Test 2 ',@month,' DEF')
ENDIF
]%%

%%=v(@Subject)=%%    \\Test 1 11 ABC 

Two things to highlight,

1. You missed to use the Concat function
2. You missed to create the @day variable

SET @day = Datepart(Now(),'day')

Answer 2

You might be able to use something like this. It basically sets a subject line when current date falls within a specific date range (holiday event etc) and then falls back on a default subject line for all other dates outside that range. I hope this helps in some way :)

Original Version

%%[
/**
* Current Date Logic
* Setting date variables to use in our subject line logic below.
*/
SET @currentDate = Format(Now(), "MM/dd/yyyy", "Date", "en-US")
SET @currentMonth = Datepart(@currentDate, "month")
SET @currentDay = Datepart(@currentDate, "day")
SET @eventStart = "11/1/2021"
SET @eventEnd = "01/31/2022"

/**
* Subject Line Logic
* Setting a custom subject line to use during event dates.
* Setting a fallback subject line to use outside event dates.
*/
IF (DateDiff(@eventStart,@currentDate,"D") >= 0) AND (DateDiff(@eventEnd,@currentDate,"D") <= 0) THEN
  /* Subject line to show during event dates */
  SET @subject = Concat("Subject Line A Test: You're current month is [", @currentMonth,"]. Show the holiday subject line.")
ELSE
  /* Subject line to show for outside of event dates */
  SET @subject = Concat("Subject Line B Test: You're current month is [", @currentMonth,"]. Show the regular subject line.")
ENDIF
]%%
Current Date: <span style="color:red;"> %%=v(@currentDate)=%%</span><br>
Current Month: <span style="color:red;"> %%=v(@currentMonth)=%%</span><br>
Current Day: <span style="color:red;"> %%=v(@currentDay)=%%</span><br>
Event Start Date: <span style="color:red;"> %%=v(@eventStart)=%%</span><br>
Event End Date: <span style="color:red;"> %%=v(@eventEnd)=%%</span><br>
Subject: <span style="color:red;"> %%=v(@subject)=%%</span><br><br>

Modified Version

%%[
/**
* Current Date Logic
* Setting date variables to use in our subject line logic below.
*/
SET @currentDate = Format(Now(), "MM/dd/yyyy", "Date", "en-US")
SET @currentMonth = Datepart(@currentDate, "month")
SET @currentDay = Datepart(@currentDate, "day")
SET @currentYear = xtyear
SET @nextYear = Add(xtyear,1)
SET @eventStart = Concat("11/1/", @currentYear)
SET @eventEnd = Concat("01/31/", @nextYear)

/**
* Subject Line Logic
* Setting a custom subject line to use during event dates.
* Setting a fallback subject line to use outside event dates.
*/
IF (DateDiff(@eventStart,@currentDate,"D") >= 0) AND (DateDiff(@eventEnd,@currentDate,"D") <= 0) THEN
  /* Subject line to show during event dates */
  SET @subject = Concat("Subject Line A Test: You're current month is [", @currentMonth,"]. Show the holiday subject line.")
ELSE
  /* Subject line to show for outside of event dates */
  SET @subject = Concat("Subject Line B Test: You're current month is [", @currentMonth,"]. Show the regular subject line.")
ENDIF
]%%
Current Date: <span style="color:red;"> %%=v(@currentDate)=%%</span><br>
Current Month: <span style="color:red;"> %%=v(@currentMonth)=%%</span><br>
Current Day: <span style="color:red;"> %%=v(@currentDay)=%%</span><br>
Current Year: <span style="color:red;"> %%=v(@currentYear)=%%</span><br>
Next Year: <span style="color:red;"> %%=v(@nextYear)=%%</span><br>
Event Start Date: <span style="color:red;"> %%=v(@eventStart)=%%</span><br>
Event End Date: <span style="color:red;"> %%=v(@eventEnd)=%%</span><br>
Subject: <span style="color:red;"> %%=v(@subject)=%%</span><br><br>