diff --git a/common/culture/eras/00_culture_eras.txt b/common/culture/eras/00_culture_eras.txt
index e8ab2d024..04b190095 100644
--- a/common/culture/eras/00_culture_eras.txt
+++ b/common/culture/eras/00_culture_eras.txt
@@ -4,7 +4,7 @@ culture_era_tribal = {
 }
 
 culture_era_early_medieval = {	
-	year = 2300
+	year = 2200
 	invalid_for_government = tribal_government
 	invalid_for_government = nomad_government
 	invalid_for_government = herder_government
@@ -37,7 +37,7 @@ culture_era_early_medieval = {
 }
 
 culture_era_high_medieval = {
-	year = 2500
+	year = 2450
 	invalid_for_government = tribal_government
 	invalid_for_government = nomad_government
 	invalid_for_government = herder_government
@@ -81,7 +81,7 @@ culture_era_high_medieval = {
 }
 
 culture_era_late_medieval = {
-	year = 2750
+	year = 2575
 	invalid_for_government = tribal_government
 	invalid_for_government = nomad_government
 	invalid_for_government = herder_government
diff --git a/common/culture/innovations/00_early_medieval_innovations.txt b/common/culture/innovations/00_early_medieval_innovations.txt
index 2460f38e4..4632da20b 100644
--- a/common/culture/innovations/00_early_medieval_innovations.txt
+++ b/common/culture/innovations/00_early_medieval_innovations.txt
@@ -225,7 +225,7 @@ innovation_currency_02 = {
 innovation_knighthood = {
 	skill = martial
 	group = culture_group_military
-	culture_era = culture_era_high_medieval
+	culture_era = culture_era_early_medieval
 	icon = @knighthood	
 
 	character_modifier = {