diff --git a/src/i18n/messages/ar.json b/src/i18n/messages/ar.json
index 5c332d222..a4403cd73 100644
--- a/src/i18n/messages/ar.json
+++ b/src/i18n/messages/ar.json
@@ -73,11 +73,33 @@
   "authoring.discussions.addTopicHelpText": "Choose a unique name for your topic",
   "authoring.discussions.blackoutDates": "Discussion blackout dates",
   "authoring.discussions.builtIn.blackoutDates.label": "Blackout dates",
-  "authoring.discussions.builtIn.blackoutDates.help": "Enter pairs of dates between which students cannot post to discussion forums. Inside the provided\n      brackets, enter an additional set of square brackets surrounding each pair of dates you add.\n      Format each pair of dates as [\"YYYY-MM-DD\", \"YYYY-MM-DD\"]. To specify times as well as dates,\n      format each pair as [\"YYYY-MM-DDTHH:MM\", \"YYYY-MM-DDTHH:MM\"]. Be sure to include the \"T\" between\n      the date and time. For example, an entry defining two blackout periods looks like this, including\n      the outer pair of square brackets: [[\"2015-09-15\", \"2015-09-21\"], [\"2015-10-01\", \"2015-10-08\"]]",
-  "authoring.discussions.builtIn.blackoutDates.formattingError": "There's a formatting error in your blackout dates.",
+  "authoring.discussions.builtIn.blackoutDates.help": "If added, learners will not be able to post in discussions between these dates.",
+  "authoring.discussions.addBlackoutDatesButton": "Add blackout date range",
+  "authoring.discussions.builtIn.configureBlackoutDates.label": "Configure blackout date range",
+  "authoring.discussions.blackoutStartDate.help": "Enter a start date, e.g. 12/10/2023",
+  "authoring.discussions.blackoutEndDate.help": "Enter an end date, e.g. 12/17/2023",
+  "authoring.discussions.blackoutStartTime.help": "Enter a start time, e.g. 09:00 AM",
+  "authoring.discussions.blackoutEndTime.help": "Enter an end time, e.g. 05:00 PM",
+  "authoring.discussions.activeBlackoutDatesDeletion.help": "These blackout dates are currently active. If deleted, learners will be able to post in discussions during these dates. Are you sure you want to proceed?",
+  "authoring.discussions.blackoutDatesDeletion.help": "If deleted, learners will be able to post in discussions during these dates.",
+  "authoring.discussions.completeBlackoutDatesDeletion.help": "Are you sure you want to delete these blackout dates?",
+  "authoring.discussions.activeBlackoutDatesDeletion.label": "Delete active blackout dates?",
+  "authoring.discussions.blackoutDatesDeletion.label": "Delete blackout dates?",
+  "authoring.blackoutDates.delete": "Delete Blackout Dates",
+  "authoring.blackoutDates.status": "{status}",
+  "authoring.blackoutDates.startDate.required": "Start date is a required field",
+  "authoring.blackoutDates.endDate.required": "End date is a required field",
+  "authoring.blackoutDates.startDate.inPast": "Start date cannot be after end date",
+  "authoring.blackoutDates.endDate.inPast": "End date cannot be before start date",
+  "authoring.blackoutDates.startTime.inPast": "Start time cannot be after end time",
+  "authoring.blackoutDates.endTime.inPast": "End time cannot be before start time",
   "authoring.topics.delete": "Delete Topic",
   "authoring.topics.expand": "Expand",
   "authoring.topics.collapse": "Collapse",
+  "authoring.blackoutDates.start.date": "Start date",
+  "authoring.blackoutDates.start.time": "Start time (optional)",
+  "authoring.blackoutDates.end.date": "End date",
+  "authoring.blackoutDates.end.time": "End time (optional)",
   "authoring.discussions.configurationChangeConsequences": "Students will lose access to any active or previous discussion posts for your course.",
   "authoring.discussions.configure.app": "Configure {name}",
   "authoring.discussions.configure": "Configure discussions",
diff --git a/src/i18n/messages/es_419.json b/src/i18n/messages/es_419.json
index 8712a7dad..a0c25b118 100644
--- a/src/i18n/messages/es_419.json
+++ b/src/i18n/messages/es_419.json
@@ -73,11 +73,33 @@
   "authoring.discussions.addTopicHelpText": "Choose a unique name for your topic",
   "authoring.discussions.blackoutDates": "Discussion blackout dates",
   "authoring.discussions.builtIn.blackoutDates.label": "Blackout dates",
-  "authoring.discussions.builtIn.blackoutDates.help": "Enter pairs of dates between which students cannot post to discussion forums. Inside the provided\n      brackets, enter an additional set of square brackets surrounding each pair of dates you add.\n      Format each pair of dates as [\"YYYY-MM-DD\", \"YYYY-MM-DD\"]. To specify times as well as dates,\n      format each pair as [\"YYYY-MM-DDTHH:MM\", \"YYYY-MM-DDTHH:MM\"]. Be sure to include the \"T\" between\n      the date and time. For example, an entry defining two blackout periods looks like this, including\n      the outer pair of square brackets: [[\"2015-09-15\", \"2015-09-21\"], [\"2015-10-01\", \"2015-10-08\"]]",
-  "authoring.discussions.builtIn.blackoutDates.formattingError": "There's a formatting error in your blackout dates.",
+  "authoring.discussions.builtIn.blackoutDates.help": "If added, learners will not be able to post in discussions between these dates.",
+  "authoring.discussions.addBlackoutDatesButton": "Add blackout date range",
+  "authoring.discussions.builtIn.configureBlackoutDates.label": "Configure blackout date range",
+  "authoring.discussions.blackoutStartDate.help": "Enter a start date, e.g. 12/10/2023",
+  "authoring.discussions.blackoutEndDate.help": "Enter an end date, e.g. 12/17/2023",
+  "authoring.discussions.blackoutStartTime.help": "Enter a start time, e.g. 09:00 AM",
+  "authoring.discussions.blackoutEndTime.help": "Enter an end time, e.g. 05:00 PM",
+  "authoring.discussions.activeBlackoutDatesDeletion.help": "These blackout dates are currently active. If deleted, learners will be able to post in discussions during these dates. Are you sure you want to proceed?",
+  "authoring.discussions.blackoutDatesDeletion.help": "If deleted, learners will be able to post in discussions during these dates.",
+  "authoring.discussions.completeBlackoutDatesDeletion.help": "Are you sure you want to delete these blackout dates?",
+  "authoring.discussions.activeBlackoutDatesDeletion.label": "Delete active blackout dates?",
+  "authoring.discussions.blackoutDatesDeletion.label": "Delete blackout dates?",
+  "authoring.blackoutDates.delete": "Delete Blackout Dates",
+  "authoring.blackoutDates.status": "{status}",
+  "authoring.blackoutDates.startDate.required": "Start date is a required field",
+  "authoring.blackoutDates.endDate.required": "End date is a required field",
+  "authoring.blackoutDates.startDate.inPast": "Start date cannot be after end date",
+  "authoring.blackoutDates.endDate.inPast": "End date cannot be before start date",
+  "authoring.blackoutDates.startTime.inPast": "Start time cannot be after end time",
+  "authoring.blackoutDates.endTime.inPast": "End time cannot be before start time",
   "authoring.topics.delete": "Delete Topic",
   "authoring.topics.expand": "Expand",
   "authoring.topics.collapse": "Collapse",
+  "authoring.blackoutDates.start.date": "Start date",
+  "authoring.blackoutDates.start.time": "Start time (optional)",
+  "authoring.blackoutDates.end.date": "End date",
+  "authoring.blackoutDates.end.time": "End time (optional)",
   "authoring.discussions.configurationChangeConsequences": "Students will lose access to any active or previous discussion posts for your course.",
   "authoring.discussions.configure.app": "Configure {name}",
   "authoring.discussions.configure": "Configure discussions",
diff --git a/src/i18n/messages/fr.json b/src/i18n/messages/fr.json
index 125331e8c..4d1dc46d1 100644
--- a/src/i18n/messages/fr.json
+++ b/src/i18n/messages/fr.json
@@ -73,11 +73,33 @@
   "authoring.discussions.addTopicHelpText": "Choose a unique name for your topic",
   "authoring.discussions.blackoutDates": "Discussion blackout dates",
   "authoring.discussions.builtIn.blackoutDates.label": "Blackout dates",
-  "authoring.discussions.builtIn.blackoutDates.help": "Enter pairs of dates between which students cannot post to discussion forums. Inside the provided\n      brackets, enter an additional set of square brackets surrounding each pair of dates you add.\n      Format each pair of dates as [\"YYYY-MM-DD\", \"YYYY-MM-DD\"]. To specify times as well as dates,\n      format each pair as [\"YYYY-MM-DDTHH:MM\", \"YYYY-MM-DDTHH:MM\"]. Be sure to include the \"T\" between\n      the date and time. For example, an entry defining two blackout periods looks like this, including\n      the outer pair of square brackets: [[\"2015-09-15\", \"2015-09-21\"], [\"2015-10-01\", \"2015-10-08\"]]",
-  "authoring.discussions.builtIn.blackoutDates.formattingError": "There's a formatting error in your blackout dates.",
+  "authoring.discussions.builtIn.blackoutDates.help": "If added, learners will not be able to post in discussions between these dates.",
+  "authoring.discussions.addBlackoutDatesButton": "Add blackout date range",
+  "authoring.discussions.builtIn.configureBlackoutDates.label": "Configure blackout date range",
+  "authoring.discussions.blackoutStartDate.help": "Enter a start date, e.g. 12/10/2023",
+  "authoring.discussions.blackoutEndDate.help": "Enter an end date, e.g. 12/17/2023",
+  "authoring.discussions.blackoutStartTime.help": "Enter a start time, e.g. 09:00 AM",
+  "authoring.discussions.blackoutEndTime.help": "Enter an end time, e.g. 05:00 PM",
+  "authoring.discussions.activeBlackoutDatesDeletion.help": "These blackout dates are currently active. If deleted, learners will be able to post in discussions during these dates. Are you sure you want to proceed?",
+  "authoring.discussions.blackoutDatesDeletion.help": "If deleted, learners will be able to post in discussions during these dates.",
+  "authoring.discussions.completeBlackoutDatesDeletion.help": "Are you sure you want to delete these blackout dates?",
+  "authoring.discussions.activeBlackoutDatesDeletion.label": "Delete active blackout dates?",
+  "authoring.discussions.blackoutDatesDeletion.label": "Delete blackout dates?",
+  "authoring.blackoutDates.delete": "Delete Blackout Dates",
+  "authoring.blackoutDates.status": "{status}",
+  "authoring.blackoutDates.startDate.required": "Start date is a required field",
+  "authoring.blackoutDates.endDate.required": "End date is a required field",
+  "authoring.blackoutDates.startDate.inPast": "Start date cannot be after end date",
+  "authoring.blackoutDates.endDate.inPast": "End date cannot be before start date",
+  "authoring.blackoutDates.startTime.inPast": "Start time cannot be after end time",
+  "authoring.blackoutDates.endTime.inPast": "End time cannot be before start time",
   "authoring.topics.delete": "Delete Topic",
   "authoring.topics.expand": "Expand",
   "authoring.topics.collapse": "Collapse",
+  "authoring.blackoutDates.start.date": "Start date",
+  "authoring.blackoutDates.start.time": "Start time (optional)",
+  "authoring.blackoutDates.end.date": "End date",
+  "authoring.blackoutDates.end.time": "End time (optional)",
   "authoring.discussions.configurationChangeConsequences": "Students will lose access to any active or previous discussion posts for your course.",
   "authoring.discussions.configure.app": "Configure {name}",
   "authoring.discussions.configure": "Configure discussions",
diff --git a/src/i18n/messages/zh_CN.json b/src/i18n/messages/zh_CN.json
index 125331e8c..4d1dc46d1 100644
--- a/src/i18n/messages/zh_CN.json
+++ b/src/i18n/messages/zh_CN.json
@@ -73,11 +73,33 @@
   "authoring.discussions.addTopicHelpText": "Choose a unique name for your topic",
   "authoring.discussions.blackoutDates": "Discussion blackout dates",
   "authoring.discussions.builtIn.blackoutDates.label": "Blackout dates",
-  "authoring.discussions.builtIn.blackoutDates.help": "Enter pairs of dates between which students cannot post to discussion forums. Inside the provided\n      brackets, enter an additional set of square brackets surrounding each pair of dates you add.\n      Format each pair of dates as [\"YYYY-MM-DD\", \"YYYY-MM-DD\"]. To specify times as well as dates,\n      format each pair as [\"YYYY-MM-DDTHH:MM\", \"YYYY-MM-DDTHH:MM\"]. Be sure to include the \"T\" between\n      the date and time. For example, an entry defining two blackout periods looks like this, including\n      the outer pair of square brackets: [[\"2015-09-15\", \"2015-09-21\"], [\"2015-10-01\", \"2015-10-08\"]]",
-  "authoring.discussions.builtIn.blackoutDates.formattingError": "There's a formatting error in your blackout dates.",
+  "authoring.discussions.builtIn.blackoutDates.help": "If added, learners will not be able to post in discussions between these dates.",
+  "authoring.discussions.addBlackoutDatesButton": "Add blackout date range",
+  "authoring.discussions.builtIn.configureBlackoutDates.label": "Configure blackout date range",
+  "authoring.discussions.blackoutStartDate.help": "Enter a start date, e.g. 12/10/2023",
+  "authoring.discussions.blackoutEndDate.help": "Enter an end date, e.g. 12/17/2023",
+  "authoring.discussions.blackoutStartTime.help": "Enter a start time, e.g. 09:00 AM",
+  "authoring.discussions.blackoutEndTime.help": "Enter an end time, e.g. 05:00 PM",
+  "authoring.discussions.activeBlackoutDatesDeletion.help": "These blackout dates are currently active. If deleted, learners will be able to post in discussions during these dates. Are you sure you want to proceed?",
+  "authoring.discussions.blackoutDatesDeletion.help": "If deleted, learners will be able to post in discussions during these dates.",
+  "authoring.discussions.completeBlackoutDatesDeletion.help": "Are you sure you want to delete these blackout dates?",
+  "authoring.discussions.activeBlackoutDatesDeletion.label": "Delete active blackout dates?",
+  "authoring.discussions.blackoutDatesDeletion.label": "Delete blackout dates?",
+  "authoring.blackoutDates.delete": "Delete Blackout Dates",
+  "authoring.blackoutDates.status": "{status}",
+  "authoring.blackoutDates.startDate.required": "Start date is a required field",
+  "authoring.blackoutDates.endDate.required": "End date is a required field",
+  "authoring.blackoutDates.startDate.inPast": "Start date cannot be after end date",
+  "authoring.blackoutDates.endDate.inPast": "End date cannot be before start date",
+  "authoring.blackoutDates.startTime.inPast": "Start time cannot be after end time",
+  "authoring.blackoutDates.endTime.inPast": "End time cannot be before start time",
   "authoring.topics.delete": "Delete Topic",
   "authoring.topics.expand": "Expand",
   "authoring.topics.collapse": "Collapse",
+  "authoring.blackoutDates.start.date": "Start date",
+  "authoring.blackoutDates.start.time": "Start time (optional)",
+  "authoring.blackoutDates.end.date": "End date",
+  "authoring.blackoutDates.end.time": "End time (optional)",
   "authoring.discussions.configurationChangeConsequences": "Students will lose access to any active or previous discussion posts for your course.",
   "authoring.discussions.configure.app": "Configure {name}",
   "authoring.discussions.configure": "Configure discussions",