diff --git a/DESCRIPTION b/DESCRIPTION
index 54505b0..ced4eb0 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: SGPmatrices
 Type: Package
 Title: Baseline Coefficient Matrices for SGP Analyses
-Version: 0.1-2.0
-Date: 2025-4-21
+Version: 0.1-3.0
+Date: 2025-12-23
 Authors@R: c(person(given=c("Damian", "W."), family="Betebenner", email="dbetebenner@nciea.org", role=c("aut", "cre")),
             person(given=c("Adam", "R."), family="Van Iwaarden", email="avaniwaarden@nciea.org", role="aut"))
 Maintainer: Damian W. Betebenner <dbetebenner@nciea.org>
diff --git a/R/addBaselineMatrices.R b/R/addBaselineMatrices.R
index 6371ee5..4ff55c0 100644
--- a/R/addBaselineMatrices.R
+++ b/R/addBaselineMatrices.R
@@ -1,26 +1,34 @@
 `addBaselineMatrices` <-
 function(state,
          year,
-         add.matrices.to.which.state=NULL) {
+         add.matrices.to.which.state=NULL,
+         SGPt = FALSE) {
 
         SGPstateData <- SGP::SGPstateData ### Needed due to assignment of values to SGPstateData
 
         ### Utility function
-        getMatrixLabel <- function(state, year, add.matrices.to.which.state) {
-             if (!paste(state, "Baseline_Matrices", sep="_") %in% names(SGPmatrices::SGPmatrices)) {
+        getMatrixLabel <- function(state, year, add.matrices.to.which.state, SGPt) {
+            ifelse(SGPt, state.label <- paste(state, "SGPt_Baseline_Matrices", sep="_"), state.label <- paste(state, "Baseline_Matrices", sep="_"))
+             if (!state.label %in% names(SGPmatrices::SGPmatrices)) {
                  stop(paste("\tNOTE: Baseline matrices for state:", state, "not in SGPmatrices. Contact package maintainer to have baseline matrices added to package."))
              }
-             tmp.years <- names(SGPmatrices::SGPmatrices[[paste(state, "Baseline_Matrices", sep="_")]])
+             tmp.years <- names(SGPmatrices::SGPmatrices[[state.label]])
              if (year < sort(tmp.years)[1]) stop("NOTE: Supplied year precedes years associated with baseline matrices in package. Contact package developer if you think this is in error.")
              if (!year %in% tmp.years) year <- tmp.years[which(year==sort(c(tmp.years, year)))-1L]
-             matrix.label <- paste0("SGPmatrices::SGPmatrices[['", paste(state, "Baseline_Matrices", sep="_"), "']][['", year, "']]")
-             message(paste0("\tNOTE: Adding ", SGP::getStateAbbreviation(state, type="Long"), " (", state, ") ", year, " baseline matrices to SGPstateData for state ",
+             if (!SGPt) {
+                 matrix.label <- paste0("SGPmatrices::SGPmatrices[['", state.label, "']][['", year, "']]")
+                 message(paste0("\tNOTE: Adding ", SGP::getStateAbbreviation(state, type="Long"), " (", state, ") ", year, " baseline matrices to SGPstateData for state ",
 			add.matrices.to.which.state))
+             } else {
+                 matrix.label <- paste0("SGPmatrices::SGPmatrices[['", state.label, "']][['", year, "']]")
+                 message(paste0("\tNOTE: Adding ", SGP::getStateAbbreviation(state, type="Long"), " (", state, ") ", year, " SGPt baseline matrices to SGPstateData for state ",
+			add.matrices.to.which.state))
+             }
              return(matrix.label)
         }
 
 	if (is.null(add.matrices.to.which.state)) add.matrices.to.which.state <- state
 
-        SGPstateData[[add.matrices.to.which.state]][["Baseline_splineMatrix"]][["Coefficient_Matrices"]] <- eval(parse(text=getMatrixLabel(state, year, add.matrices.to.which.state)))
+        SGPstateData[[add.matrices.to.which.state]][["Baseline_splineMatrix"]][["Coefficient_Matrices"]] <- eval(parse(text=getMatrixLabel(state, year, add.matrices.to.which.state, SGPt)))
         return(SGPstateData)
 } ### END addBaselineMatrices
diff --git a/R/zzz.R b/R/zzz.R
index dd12d4c..50ba03b 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -32,7 +32,7 @@ function(libname, pkgname) {
 
         # Define a friendly startup message
 		message_text <- paste0(
-		    magenta(bold("\uD83C\uDF89 SGPmatrices v", installed.version, sep="")), " - ", toOrdinal::toOrdinalDate("2025-4-21"), "\n",
+		    magenta(bold("\uD83C\uDF89 SGPmatrices v", installed.version, sep="")), " - ", toOrdinal::toOrdinalDate("2025-12-23"), "\n",
 			strrep("\u2501", 40), "\n",
     	    bold("\U1F4E6 CRAN: "), cran.version, "\n",
     	    bold("\U1F527 Dev: "), dev.version, "\n",
diff --git a/README.md b/README.md
index cb3308c..4599898 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ The baseline coefficient matrices embedded in **SGPmatrices** are updated period
 * AZ_Baseline_Matrices: Contains 2021 baseline matrices for Arizona AzM2.
 * CO_Baseline_Matrices: Contains 2021 baseline matrices for Colorado CMAS.
 * HI_Baseline_Matrices: Contains 2021 baseline matrices for Hawaii SBA.
+* HI_SGPt_Baseline_Matrices: Contains 2021 SGPt time-dependent baseline matrices for Hawaii SBA.
 * IN_Baseline_Matrices: Contains 2021 baseline matrices for Indiana ILEARN/ISTEP+.
 * MA_Baseline_Matrices: Contains 2021 baseline matrices for Massachusetts MCAS 2.0/PARCC.
 * MI_Baseline_Matrices: Contains 2021 baseline matrices for Michigan MSTEP/PSAT/SAT.
diff --git a/data/SGPmatrices.rda b/data/SGPmatrices.rda
index bc485aa..ff341ed 100644
Binary files a/data/SGPmatrices.rda and b/data/SGPmatrices.rda differ
diff --git a/inst/CITATION b/inst/CITATION
index 35830a1..7e82b2f 100644
--- a/inst/CITATION
+++ b/inst/CITATION
@@ -4,11 +4,11 @@ citEntry(entry = "Manual",
          title        = "{SGPmatrices}: Baseline coefficient matrices for SGP analyses.",
          author       = "Damian W. Betebenner and Adam R. Van Iwaarden",
          year         = "2025",
-         note         = "R package version 0.1-2.0",
+         note         = "R package version 0.1-3.0",
          url          = "https://github.com/CenterForAssessment/SGPmatrices/",
          
          textVersion  = paste("Damian W. Betebenner and Adam R. Van Iwaarden (2025).",
                         "SGPmatrices: Baseline coefficient matrices for SGP analyses.",
-                        "(R package version 0.1-2.0",
+                        "(R package version 0.1-3.0",
                         "URL https://github.com/CenterForAssessment/SGPmatrices/")
 )
diff --git a/man/SGPmatrices-package.Rd b/man/SGPmatrices-package.Rd
index c08a46d..cd89200 100644
--- a/man/SGPmatrices-package.Rd
+++ b/man/SGPmatrices-package.Rd
@@ -10,8 +10,8 @@
 \tabular{ll}{
 Package: \tab SGPmatrices\cr
 Type: \tab Package\cr
-Version: \tab 0.1-2.0\cr
-Date: \tab 2025-4-21\cr
+Version: \tab 0.1-3.0\cr
+Date: \tab 2025-12-23\cr
 License: \tab GPL-3\cr
 LazyLoad: \tab Yes\cr
 LazyData: \tab Yes\cr
diff --git a/man/addBaselineMatrices.Rd b/man/addBaselineMatrices.Rd
index adafc2d..b2d44fb 100644
--- a/man/addBaselineMatrices.Rd
+++ b/man/addBaselineMatrices.Rd
@@ -9,7 +9,8 @@ The function addBaselineMatrices adds baseline matrices contained in the SGPmatr
 addBaselineMatrices(
     state,
     year,
-    add.matrices.to.which.state=NULL)
+    add.matrices.to.which.state=NULL,
+    SGPt = FALSE)
 }
 
 \arguments{
@@ -19,6 +20,10 @@ addBaselineMatrices(
   }
   \item{add.matrices.to.which.state}{A character string for the state/assessment abbreviation where the baseline matrices will be placed in SGPstateData. If not argument is supplied the default is to use the state/assessment abbreviation supplied via the argument \code{state}.
   }
+  \item{SGPt}{A logical value indicating whether to add SGPt baseline matrices. If not argument is supplied the default is to use the value of \code{SGPt} embedded in the SGPstateData object.
+    If \code{SGPt} is \code{TRUE}, the function will add SGPt baseline matrices to the SGPstateData object.
+    If \code{SGPt} is \code{FALSE}, the function will add baseline matrices to the SGPstateData object.
+  }
 }
 
 \value{Returns SGPstateData with the matrices associated with argument \code{state} embedded in the position associated with the argument \code{add.matrices.to.state} (defaults to \code{state}).