diff --git a/gitinspector/blame.py b/gitinspector/blame.py
index 3c964cbe..76797b48 100644
--- a/gitinspector/blame.py
+++ b/gitinspector/blame.py
@@ -32,8 +32,18 @@
 
 class BlameEntry(object):
 	rows = 0
-	skew = 0 # Used when calculating average code age.
+	skew_w = 0 # Used when calculating average code age.
+	skew_m = 0 # Used when calculating average code age.
 	comments = 0
+	useweeks = None
+
+	def __init__(self, useweeks):
+		self.useweeks = useweeks
+
+        def get_skew(self, forcemonths = False):
+                if not self.useweeks or forcemonths:
+                        return self.skew_m
+                return self.skew_w
 
 __thread_lock__ = threading.BoundedSemaphore(NUM_THREADS)
 __blame_lock__ = threading.Lock()
@@ -79,14 +89,15 @@ def __handle_blamechunk_content__(self, content):
 			__blame_lock__.acquire() # Global lock used to protect calls from here...
 
 			if self.blames.get((author, self.filename), None) == None:
-				self.blames[(author, self.filename)] = BlameEntry()
+				self.blames[(author, self.filename)] = BlameEntry(self.useweeks)
 
 			self.blames[(author, self.filename)].comments += comments
 			self.blames[(author, self.filename)].rows += 1
 
 			if (self.blamechunk_time - self.changes.first_commit_date).days > 0:
-				self.blames[(author, self.filename)].skew += ((self.changes.last_commit_date - self.blamechunk_time).days /
-				                                             (7.0 if self.useweeks else AVG_DAYS_PER_MONTH))
+				skew = (self.changes.last_commit_date - self.blamechunk_time).days;
+				self.blames[(author, self.filename)].skew_w += (skew / 7.0)
+				self.blames[(author, self.filename)].skew_m += (skew / AVG_DAYS_PER_MONTH)
 
 			__blame_lock__.release() # ...to here.
 
@@ -123,6 +134,7 @@ def run(self):
 class Blame(object):
 	def __init__(self, repo, hard, useweeks, changes):
 		self.blames = {}
+		self.useweeks = useweeks
 		ls_tree_r = subprocess.Popen(["git", "ls-tree", "--name-only", "-r", interval.get_ref()], bufsize=1,
 		                             stdout=subprocess.PIPE).stdout
 		lines = ls_tree_r.readlines()
@@ -190,10 +202,11 @@ def get_summed_blames(self):
 		summed_blames = {}
 		for i in self.blames.items():
 			if summed_blames.get(i[0][0], None) == None:
-				summed_blames[i[0][0]] = BlameEntry()
+				summed_blames[i[0][0]] = BlameEntry(self.useweeks)
 
 			summed_blames[i[0][0]].rows += i[1].rows
-			summed_blames[i[0][0]].skew += i[1].skew
+			summed_blames[i[0][0]].skew_w += i[1].skew_w
+			summed_blames[i[0][0]].skew_m += i[1].skew_m
 			summed_blames[i[0][0]].comments += i[1].comments
 
 		return summed_blames
diff --git a/gitinspector/config.py b/gitinspector/config.py
index 4eaf15c6..12da453b 100644
--- a/gitinspector/config.py
+++ b/gitinspector/config.py
@@ -73,6 +73,7 @@ def read(self):
 		self.run.metrics = self.__read_git_config_bool__("metrics")
 		self.run.responsibilities = self.__read_git_config_bool__("responsibilities")
 		self.run.useweeks = self.__read_git_config_bool__("weeks")
+		self.run.forcemonths = self.__read_git_config_bool__("forcemonths")
 
 		var = self.__read_git_config_string__("since")
 		if var[0]:
diff --git a/gitinspector/gitinspector.py b/gitinspector/gitinspector.py
index b725fb23..c6368be7 100644
--- a/gitinspector/gitinspector.py
+++ b/gitinspector/gitinspector.py
@@ -50,6 +50,7 @@ def __init__(self):
 		self.grading = False
 		self.timeline = False
 		self.useweeks = False
+		self.forcemonths = False
 
 	def process(self, repos):
 		localization.check_compatibility(version.__version__)
@@ -83,9 +84,11 @@ def process(self, repos):
 		outputable.output(ChangesOutput(summed_changes))
 
 		if changes.get_commits():
-			outputable.output(BlameOutput(summed_changes, summed_blames))
+			outputable.output(BlameOutput(summed_changes, summed_blames, self.forcemonths))
 
 			if self.timeline:
+				if self.useweeks and self.forcemonths:
+					outputable.output(TimelineOutput(summed_changes, False))
 				outputable.output(TimelineOutput(summed_changes, self.useweeks))
 
 			if self.include_metrics:
@@ -133,10 +136,10 @@ def main():
 	repos = []
 
 	try:
-		opts, args = optval.gnu_getopt(argv[1:], "f:F:hHlLmrTwx:", ["exclude=", "file-types=", "format=",
+		opts, args = optval.gnu_getopt(argv[1:], "f:F:hHlLmrTwMx:", ["exclude=", "file-types=", "format=",
 		                                         "hard:true", "help", "list-file-types:true", "localize-output:true",
 		                                         "metrics:true", "responsibilities:true", "since=", "grading:true",
-		                                         "timeline:true", "until=", "version", "weeks:true"])
+		                                         "timeline:true", "until=", "version", "weeks:true", "forcemonths:true"])
 		repos = __get_validated_git_repos__(set(args))
 
 		#We need the repos above to be set before we read the git config.
@@ -196,6 +199,10 @@ def main():
 				run.useweeks = True
 			elif o == "--weeks":
 				run.useweeks = optval.get_boolean_argument(a)
+			elif o == "-M":
+				run.forcemonths = True
+			elif o == "--forcemonths":
+				run.forcemonths = optval.get_boolean_argument(a)
 			elif o in("-x", "--exclude"):
 				if clear_x_on_next_pass:
 					clear_x_on_next_pass = False
diff --git a/gitinspector/output/blameoutput.py b/gitinspector/output/blameoutput.py
index f49ee63b..c23f2aa4 100644
--- a/gitinspector/output/blameoutput.py
+++ b/gitinspector/output/blameoutput.py
@@ -31,19 +31,25 @@
                      "intact in the current revision")
 
 class BlameOutput(Outputable):
-	def __init__(self, changes, blame):
+	def __init__(self, changes, blame, forcemonths):
 		if format.is_interactive_format():
 			print("")
 
 		self.changes = changes
 		self.blame = blame
+		self.forcemonths = forcemonths
 		Outputable.__init__(self)
 
 	def output_html(self):
 		blame_xml = "<div><div class=\"box\">"
 		blame_xml += "<p>" + _(BLAME_INFO_TEXT) + ".</p><div><table id=\"blame\" class=\"git\">"
-		blame_xml += "<thead><tr> <th>{0}</th> <th>{1}</th> <th>{2}</th> <th>{3}</th> <th>{4}</th> </tr></thead>".format(
-		             _("Author"), _("Rows"), _("Stability"), _("Age"), _("% in comments"))
+		if self.forcemonths and self.blame.useweeks:
+			formtup = (_("Author"), _("Rows"), _("Stability"), _("Age, months"), _("Age, weeks"), _("% in comments"))
+			formmkup = "<thead><tr> <th>{0}</th> <th>{1}</th> <th>{2}</th> <th>{3}</th> <th>{4}</th> <th>{5}</th> </tr></thead>"
+		else:
+			formtup = (_("Author"), _("Rows"), _("Stability"), _("Age"), _("% in comments"))
+			formmkup = "<thead><tr> <th>{0}</th> <th>{1}</th> <th>{2}</th> <th>{3}</th> <th>{4}</th> </tr></thead>"
+		blame_xml += formmkup.format(*formtup)
 		blame_xml += "<tbody>"
 		chart_data = ""
 		blames = sorted(self.blame.get_summed_blames().items())
@@ -64,7 +70,9 @@ def output_html(self):
 
 			blame_xml += "<td>" + str(entry[1].rows) + "</td>"
 			blame_xml += "<td>" + ("{0:.1f}".format(Blame.get_stability(entry[0], entry[1].rows, self.changes)) + "</td>")
-			blame_xml += "<td>" + "{0:.1f}".format(float(entry[1].skew) / entry[1].rows) + "</td>"
+			if self.forcemonths and self.blame.useweeks:
+				blame_xml += "<td>" + "{0:.1f}".format(float(entry[1].get_skew(True)) / entry[1].rows) + "</td>"
+			blame_xml += "<td>" + "{0:.1f}".format(float(entry[1].get_skew()) / entry[1].rows) + "</td>"
 			blame_xml += "<td>" + "{0:.2f}".format(100.0 * entry[1].comments / entry[1].rows) + "</td>"
 			blame_xml += "<td style=\"display: none\">" + work_percentage + "</td>"
 			blame_xml += "</tr>"
@@ -73,7 +81,7 @@ def output_html(self):
 			if blames[-1] != entry:
 				chart_data += ", "
 
-		blame_xml += "<tfoot><tr> <td colspan=\"5\">&nbsp;</td> </tr></tfoot></tbody></table>"
+		blame_xml += "<tfoot><tr> <td colspan=\"%d\">&nbsp;</td> </tr></tfoot></tbody></table>" % len(formtup)
 		blame_xml += "<div class=\"chart\" id=\"blame_chart\"></div></div>"
 		blame_xml += "<script type=\"text/javascript\">"
 		blame_xml += "    blame_plot = $.plot($(\"#blame_chart\"), [{0}], {{".format(chart_data)
@@ -107,7 +115,13 @@ def output_json(self):
 			rows_json = "\t\t\t\t\"rows\": " + str(i[1].rows) + ",\n"
 			stability_json = ("\t\t\t\t\"stability\": " + "{0:.1f}".format(Blame.get_stability(i[0], i[1].rows,
 			                  self.changes)) + ",\n")
-			age_json = ("\t\t\t\t\"age\": " + "{0:.1f}".format(float(i[1].skew) / i[1].rows) + ",\n")
+			if self.forcemonths and self.blame.useweeks:
+				age_json = ("\t\t\t\t\"age_months\": " + "{0:.1f}".format(float(i[1].get_skew(True)) / i[1].rows) + ",\n")
+				age_t_name = "age_weeks"
+			else:
+				age_json = ""
+				age_t_name = "age"
+			age_json += (("\t\t\t\t\"%s\": " % age_t_name) + "{0:.1f}".format(float(i[1].get_skew()) / i[1].rows) + ",\n")
 			percentage_in_comments_json = ("\t\t\t\t\"percentage_in_comments\": " +
 			                               "{0:.2f}".format(100.0 * i[1].comments / i[1].rows) + "\n")
 			blame_json += ("{\n" + name_json + email_json + gravatar_json + rows_json + stability_json + age_json +
@@ -122,15 +136,27 @@ def output_text(self):
 			terminal.clear_row()
 
 		print(textwrap.fill(_(BLAME_INFO_TEXT) + ":", width=terminal.get_size()[0]) + "\n")
-		terminal.printb(terminal.ljust(_("Author"), 21) + terminal.rjust(_("Rows"), 10) + terminal.rjust(_("Stability"), 15) +
-		                terminal.rjust(_("Age"), 13) + terminal.rjust(_("% in comments"), 20))
+		if self.forcemonths and self.blame.useweeks:
+			fparams = (18, 8, 10, 12, 14)
+		else:
+			fparams = (20, 10, 14, 12, 19)
+		auwidth, rwidth, swidth, awidth, cwidth = fparams
+		prints = terminal.ljust(_("Author"), auwidth + 1) + terminal.rjust(_("Rows"), rwidth) + terminal.rjust(_("Stability"), swidth + 1)
+		if self.forcemonths and self.blame.useweeks:
+			prints += terminal.rjust(_("Age, months"), awidth + 1) + terminal.rjust(_("Age, weeks"), awidth + 1)
+		else:
+			prints += terminal.rjust(_("Age"), awidth + 1)
+		prints += terminal.rjust(_("% in comments"), cwidth + 1)
+		terminal.printb(prints)
 
 		for i in sorted(self.blame.get_summed_blames().items()):
-			print(terminal.ljust(i[0], 20)[0:20 - terminal.get_excess_column_count(i[0])], end=" ")
-			print(str(i[1].rows).rjust(10), end=" ")
-			print("{0:.1f}".format(Blame.get_stability(i[0], i[1].rows, self.changes)).rjust(14), end=" ")
-			print("{0:.1f}".format(float(i[1].skew) / i[1].rows).rjust(12), end=" ")
-			print("{0:.2f}".format(100.0 * i[1].comments / i[1].rows).rjust(19))
+			print(terminal.ljust(i[0], auwidth)[0:auwidth - terminal.get_excess_column_count(i[0])], end=" ")
+			print(str(i[1].rows).rjust(rwidth), end=" ")
+			print("{0:.1f}".format(Blame.get_stability(i[0], i[1].rows, self.changes)).rjust(swidth), end=" ")
+			if self.forcemonths and self.blame.useweeks:
+				print("{0:.1f}".format(float(i[1].get_skew(True)) / i[1].rows).rjust(awidth), end=" ")
+			print("{0:.1f}".format(float(i[1].get_skew()) / i[1].rows).rjust(awidth), end=" ")
+			print("{0:.2f}".format(100.0 * i[1].comments / i[1].rows).rjust(cwidth))
 
 	def output_xml(self):
 		message_xml = "\t\t<message>" + _(BLAME_INFO_TEXT) + "</message>\n"
@@ -145,7 +171,13 @@ def output_xml(self):
 			rows_xml = "\t\t\t\t<rows>" + str(i[1].rows) + "</rows>\n"
 			stability_xml = ("\t\t\t\t<stability>" + "{0:.1f}".format(Blame.get_stability(i[0], i[1].rows,
 			                 self.changes)) + "</stability>\n")
-			age_xml = ("\t\t\t\t<age>" + "{0:.1f}".format(float(i[1].skew) / i[1].rows) + "</age>\n")
+			if self.forcemonths and self.blame.useweeks:
+				age_xml = ("\t\t\t\t<age_months>" + "{0:.1f}".format(float(i[1].get_skew(True)) / i[1].rows) + "</age_months>\n")
+				age_t_name = "age_weeks"
+			else:
+				age_xml = ""
+				age_t_name = "age"
+			age_xml += (("\t\t\t\t<%s>" % age_t_name) + "{0:.1f}".format(float(i[1].get_skew()) / i[1].rows) + ("</%s>\n" % age_t_name))
 			percentage_in_comments_xml = ("\t\t\t\t<percentage-in-comments>" + "{0:.2f}".format(100.0 * i[1].comments / i[1].rows) +
 			                              "</percentage-in-comments>\n")
 			blame_xml += ("\t\t\t<author>\n" + name_xml + email_xml + gravatar_xml + rows_xml + stability_xml +
diff --git a/gitinspector/output/timelineoutput.py b/gitinspector/output/timelineoutput.py
index f76228bf..dc8301cf 100644
--- a/gitinspector/output/timelineoutput.py
+++ b/gitinspector/output/timelineoutput.py
@@ -24,7 +24,8 @@
 from .. import format, gravatar, terminal, timeline
 from .outputable import Outputable
 
-TIMELINE_INFO_TEXT = N_("The following history timeline has been gathered from the repository")
+TIMELINE_INFO_TEXT_M = N_("The following monthly history timeline has been gathered from the repository")
+TIMELINE_INFO_TEXT_W = N_("The following weekly history timeline has been gathered from the repository")
 MODIFIED_ROWS_TEXT = N_("Modified Rows:")
 
 def __output_row__text__(timeline_data, periods, names):
@@ -102,9 +103,14 @@ def __init__(self, changes, useweeks):
 		self.useweeks = useweeks
 		Outputable.__init__(self)
 
+        def get_tinfo_txt(self):
+                if self.useweeks:
+                        return (_(TIMELINE_INFO_TEXT_W))
+                return (_(TIMELINE_INFO_TEXT_M))
+
 	def output_text(self):
 		if self.changes.get_commits():
-			print("\n" + textwrap.fill(_(TIMELINE_INFO_TEXT) + ":", width=terminal.get_size()[0]))
+			print("\n" + textwrap.fill(self.get_tinfo_txt() + ":", width=terminal.get_size()[0]))
 
 			timeline_data = timeline.TimelineData(self.changes, self.useweeks)
 			periods = timeline_data.get_periods()
@@ -123,7 +129,7 @@ def output_html(self):
 			max_periods_per_row = 8
 
 			timeline_xml = "<div><div id=\"timeline\" class=\"box\">"
-			timeline_xml += "<p>" + _(TIMELINE_INFO_TEXT) + ".</p>"
+			timeline_xml += "<p>" + self.get_tinfo_txt() + ".</p>"
 			print(timeline_xml)
 
 			for i in range(0, len(periods), max_periods_per_row):
@@ -134,7 +140,7 @@ def output_html(self):
 
 	def output_json(self):
 		if self.changes.get_commits():
-			message_json = "\t\t\t\"message\": \"" + _(TIMELINE_INFO_TEXT) + "\",\n"
+			message_json = "\t\t\t\"message\": \"" + self.get_tinfo_txt() + "\",\n"
 			timeline_json = ""
 			periods_json = "\t\t\t\"period_length\": \"{0}\",\n".format("week" if self.useweeks else "month")
 			periods_json += "\t\t\t\"periods\": [\n\t\t\t"
@@ -174,7 +180,7 @@ def output_json(self):
 
 	def output_xml(self):
 		if self.changes.get_commits():
-			message_xml = "\t\t<message>" + _(TIMELINE_INFO_TEXT) + "</message>\n"
+			message_xml = "\t\t<message>" + self.get_tinfo_txt() + "</message>\n"
 			timeline_xml = ""
 			periods_xml = "\t\t<periods length=\"{0}\">\n".format("week" if self.useweeks else "month")