diff --git a/cmd/asbackup/readme.md b/cmd/asbackup/readme.md
index 6cb46425..7b96cee4 100644
--- a/cmd/asbackup/readme.md
+++ b/cmd/asbackup/readme.md
@@ -82,14 +82,14 @@ Backup Flags:
                                     Format: base64 encoded string
                                     Example: EjRWeJq83vEjRRI0VniavN7xI0U=
                                     
-  -a, --modified-before string      <YYYY-MM-DD_HH:MM:SS>
+  -a, --modified-after string       <YYYY-MM-DD_HH:MM:SS>
                                     Perform an incremental backup; only include records 
                                     that changed after the given date and time. The system's 
                                     local timezone applies. If only HH:MM:SS is specified, then
                                     today's date is assumed as the date. If only YYYY-MM-DD is 
                                     specified, then 00:00:00 (midnight) is assumed as the time.
                                     
-  -b, --modified-after string       <YYYY-MM-DD_HH:MM:SS>
+  -b, --modified-before string      <YYYY-MM-DD_HH:MM:SS>
                                     Only include records that last changed before the given
                                     date and time. May combined with --modified-after to specify a range.
   -M, --max-records int             The number of records approximately to back up. 0 - all records
diff --git a/cmd/internal/app/configs.go b/cmd/internal/app/configs.go
index 6bdc9fe5..d5fd890c 100644
--- a/cmd/internal/app/configs.go
+++ b/cmd/internal/app/configs.go
@@ -32,6 +32,10 @@ var (
 	expPartitionRange  = regexp.MustCompile(`^([0-9]|[1-9][0-9]{1,3}|40[0-8][0-9]|409[0-5])\-([1-9]|[1-9][0-9]{1,3}|40[0-8][0-9]|409[0-6])$`)
 	expPartitionID     = regexp.MustCompile(`^(409[0-6]|40[0-8]\d|[123]?\d{1,3}|0)$`)
 	expPartitionDigest = regexp.MustCompile(`^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$`)
+	// Time parsing expressions.
+	expTimeOnly = regexp.MustCompile(`^\d{2}:\d{2}:\d{2}$`)
+	expDateOnly = regexp.MustCompile(`^\d{4}-\d{2}-\d{2}$`)
+	expDateTime = regexp.MustCompile(`^\d{4}-\d{2}-\d{2}_\d{2}:\d{2}:\d{2}$`)
 )
 
 func mapBackupConfig(
@@ -105,7 +109,7 @@ func mapBackupConfig(
 	c.SecretAgentConfig = mapSecretAgentConfig(secretAgent)
 
 	if backupParams.ModifiedBefore != "" {
-		modBeforeTime, err := time.Parse("2006-01-02_15:04:05", backupParams.ModifiedBefore)
+		modBeforeTime, err := parseLocalTimeToUTC(backupParams.ModifiedBefore)
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse modified before date: %w", err)
 		}
@@ -114,7 +118,7 @@ func mapBackupConfig(
 	}
 
 	if backupParams.ModifiedAfter != "" {
-		modAfterTime, err := time.Parse("2006-01-02_15:04:05", backupParams.ModifiedAfter)
+		modAfterTime, err := parseLocalTimeToUTC(backupParams.ModifiedAfter)
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse modified after date: %w", err)
 		}
@@ -403,3 +407,33 @@ func parsePartitionFilterByID(filter string) (*aerospike.PartitionFilter, error)
 func parsePartitionFilterByDigest(namespace, filter string) (*aerospike.PartitionFilter, error) {
 	return backup.NewPartitionFilterByDigest(namespace, filter)
 }
+
+func parseLocalTimeToUTC(timeString string) (time.Time, error) {
+	location, err := time.LoadLocation("Local")
+	if err != nil {
+		return time.Time{}, fmt.Errorf("failed to load timezone location: %w", err)
+	}
+
+	var validTime string
+
+	switch {
+	case expDateTime.MatchString(timeString):
+		validTime = timeString
+	case expTimeOnly.MatchString(timeString):
+		currentTime := time.Now().In(location)
+		validTime = currentTime.Format("2006-01-02") + "_" + timeString
+	case expDateOnly.MatchString(timeString):
+		validTime = timeString + "_00:00:00"
+	default:
+		return time.Time{}, fmt.Errorf("unknown time format: %s", timeString)
+	}
+
+	localTime, err := time.ParseInLocation("2006-01-02_15:04:05", validTime, location)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("failed to parse time %s: %w", timeString, err)
+	}
+
+	utcTime := localTime.UTC()
+
+	return utcTime, nil
+}
diff --git a/cmd/internal/flags/backup.go b/cmd/internal/flags/backup.go
index 9c26e985..2e78df7b 100644
--- a/cmd/internal/flags/backup.go
+++ b/cmd/internal/flags/backup.go
@@ -51,7 +51,7 @@ func (f *Backup) NewFlagSet() *pflag.FlagSet {
 			"This argument is mutually exclusive to partition-list.\n"+
 			"Format: base64 encoded string\n"+
 			"Example: EjRWeJq83vEjRRI0VniavN7xI0U=\n")
-	flagSet.StringVarP(&f.ModifiedBefore, "modified-before", "a",
+	flagSet.StringVarP(&f.ModifiedAfter, "modified-after", "a",
 		"",
 		"<YYYY-MM-DD_HH:MM:SS>\n"+
 			"Perform an incremental backup; only include records \n"+
@@ -59,7 +59,7 @@ func (f *Backup) NewFlagSet() *pflag.FlagSet {
 			"local timezone applies. If only HH:MM:SS is specified, then\n"+
 			"today's date is assumed as the date. If only YYYY-MM-DD is \n"+
 			"specified, then 00:00:00 (midnight) is assumed as the time.\n")
-	flagSet.StringVarP(&f.ModifiedAfter, "modified-after", "b",
+	flagSet.StringVarP(&f.ModifiedBefore, "modified-before", "b",
 		"",
 		"<YYYY-MM-DD_HH:MM:SS>\n"+
 			"Only include records that last changed before the given\n"+