diff --git a/.Rbuildignore b/.Rbuildignore
index fe2d6d021..1004b4bbc 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -10,7 +10,7 @@ RELEASE_CYCLE.md
 ^_pkgdown\.yml$
 ^docs$
 ^pkgdown$
-^vignettes/chapter*.Rmd
+^vignettes/chapter.*\\.Rmd$
 ^dev-functions$
 .zenodo.json
 ^doc$
diff --git a/NEWS.md b/NEWS.md
index fde81d0c7..cadf84272 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,7 @@
+# CHANGES IN GGIR VERSION 3.1-1
+
+- Part 2: Corrected calculation of LXhr and MXhr which had one hour offset when timing was after midnight, #1117
+
 # CHANGES IN GGIR VERSION 3.1-0
 
 - Minor issue fixes introduced in 3.0-10 related to handling nights without sustained inactivity bouts, handling recordings without midnight and storage of GGIR version in the part 4 output when there are no valid nights.
@@ -151,7 +155,7 @@ If you prefer to keep old functionality then divide your old value by 24 #1050.
 
 # CHANGES IN GGIR VERSION 3.0-1
 
-- Part 2: Added option to provide a csv file with start and end dates when accelerometer is expected to be worn #943
+- Part 2: Added parameters study_dates_file and study_dateformat to specify csv file with start and end date when accelerometer is expected to be worn #943
 
 - Part 5: Now stores dictionary for variable names in part 5 reports #938
 
diff --git a/R/g.analyse.perday.R b/R/g.analyse.perday.R
index 27dd882a5..195cc4d92 100644
--- a/R/g.analyse.perday.R
+++ b/R/g.analyse.perday.R
@@ -422,7 +422,7 @@ g.analyse.perday = function(ndays, firstmidnighti, time, nfeatures,
                     exfi = collectfi[which(params_247[["winhr"]] == winhr_value)]
                     if (length(varnum) > (60 / ws3) * 60 * winhr_value * 1.2) { # Calculate values
                       # Time window for L5 & M5 analysis
-                      t0_LFMF =  1 #start
+                      t0_LFMF =  0 #start
                       # L5M5window[2] #end in 24 hour clock hours (if a value higher than 24 is chosen, it will take early hours of previous day to complete the 5 hour window
                       t1_LFMF = length(varnum) / (60 * (60 / ws3)) + (winhr_value - (params_247[["M5L5res"]] / 60))