diff --git a/application/utils.inc.php b/application/utils.inc.php
index 1e91239cc..ed5adb49e 100644
--- a/application/utils.inc.php
+++ b/application/utils.inc.php
@@ -874,11 +874,50 @@ class utils
 	 */
 	public static function DateTimeFormatToPHP($sOldDateTimeFormat)
 	{
-		$aSearch = array('%d', '%m', '%y', '%Y', '%H', '%i', '%s');
-		$aReplacement = array('d', 'm', 'y', 'Y', 'H', 'i', 's');
+		$aSearch = ['%d', '%m', '%y', '%Y', '%H', '%i', '%s'];
+		$aReplacement = ['d', 'm', 'y', 'Y', 'H', 'i', 's'];
 		return str_replace($aSearch, $aReplacement, $sOldDateTimeFormat);
 	}
 
+	/**
+	 * Convert an old strtime() date/time format specification {@link https://www.php.net/manual/fr/function.strftime.php}
+	 * to a format compatible with \DateTime::format {@link https://www.php.net/manual/fr/datetime.format.php}
+	 *
+	 * Example: '%Y-%m-%d %H:%M:%S' => 'Y-m-d H:i:s'
+	 *
+	 * Note: Not all strftime() formats can be converted, in which case they will be present in the returned string (eg. '%U' or '%W')
+	 *
+	 * @param string $sOldStrftimeFormat
+	 *
+	 * @return string
+	 * @since 3.1.0
+	 */
+	public static function StrftimeFormatToDateTimeFormat(string $sOldStrftimeFormat): string
+	{
+		$aSearch = [
+			'%d', '%m', '%y', '%Y', '%H', '%M', '%S', // Most popular formats
+			'%a', '%A', '%e', '%j', '%u', '%w', // Day formats
+			'%U', '%V', '%W', // Week formats
+			'%b', '%B', '%h', // Month formats
+			'%C', '%g', '%G', // Year formats
+			'%k', '%I', '%l', '%p', '%P', '%r', '%R', '%T', '%X', '%z', '%Z', // Time formats
+			'%c', '%D', '%F', '%s', '%x', // Datetime formats
+			'%n', '%t', '%%', // Misc. formats
+		];
+		$aReplacement = [
+			'd', 'm', 'y', 'Y', 'H', 'i', 's',
+			'D', 'l', 'j', 'z', 'N', 'w',
+			'%U', 'W', '%W',
+			'M', 'F', 'M',
+			'%C', 'y', 'Y',
+			'G', 'h', 'g', 'A', 'a', 'h:i:s A', 'H:i', 'H:i:s', '%X', 'O', 'T',
+			'%c', 'm/d/y', 'Y-m-d', 'U', '%x',
+			'%n', '%t', '%',
+		];
+
+		return str_replace($aSearch, $aReplacement, $sOldStrftimeFormat);
+	}
+
 	/**
 	 * Allow to set cached config. Useful when running with {@link Parameters} for example.
 	 * @param \Config $oConfig
diff --git a/core/log.class.inc.php b/core/log.class.inc.php
index 7314202f6..b8a2d358e 100644
--- a/core/log.class.inc.php
+++ b/core/log.class.inc.php
@@ -551,6 +551,12 @@ class LogChannels
 	 */
 	public const NOTIFICATIONS = 'notifications';
 
+	/**
+	 * @var string Everything related to the backup / restore
+	 * @since 3.1.0
+	 */
+	public const BACKUP = 'backup';
+
 	/**
 	 * @since 3.0.0
 	 */
diff --git a/datamodels/2.x/itop-backup/backup.params.distrib b/datamodels/2.x/itop-backup/backup.params.distrib
index 8c9bfd304..98b02de02 100644
--- a/datamodels/2.x/itop-backup/backup.params.distrib
+++ b/datamodels/2.x/itop-backup/backup.params.distrib
@@ -23,7 +23,7 @@ auth_pwd = admin
 # Full path or relative to current directory
 #
 # Formatting rules:
-# %Y-%m-%d => 2011-01-25... see PHP documentation of strftime()
+# %Y-%m-%d => 2011-01-25... see PHP documentation of strftime() (https://www.php.net/manual/fr/function.strftime.php)
 # Placeholders:
 #    __HOST__      MySQL server
 #    __DB__        Database name
diff --git a/datamodels/2.x/itop-backup/backup.php b/datamodels/2.x/itop-backup/backup.php
index 3c8f45fad..eb4453fa8 100644
--- a/datamodels/2.x/itop-backup/backup.php
+++ b/datamodels/2.x/itop-backup/backup.php
@@ -69,7 +69,7 @@ function Usage($oP)
 		$oP->p('auth_user: login, must be administrator');
 		$oP->p('auth_pwd: ...');
 	}
-	$oP->p('backup_file [optional]: name of the file to store the backup into. Follows the PHP strftime format spec. The following placeholders are available: __HOST__, __DB__, __SUBNAME__');
+	$oP->p('backup_file [optional]: name of the file to store the backup into. Follows the PHP strftime() format spec (https://www.php.net/manual/fr/function.strftime.php). The following placeholders are available: __HOST__, __DB__, __SUBNAME__');
 	$oP->p('simulate [optional]: set to check the name of the file that would be created');
 	$oP->p('mysql_bindir [optional]: specify the path for mysqldump');
 
diff --git a/datamodels/2.x/itop-backup/check-backup.php b/datamodels/2.x/itop-backup/check-backup.php
index 01b171cec..e8ec371a7 100644
--- a/datamodels/2.x/itop-backup/check-backup.php
+++ b/datamodels/2.x/itop-backup/check-backup.php
@@ -108,20 +108,9 @@ function MakeArchiveFileName($iRefTime = null)
 	$sDefaultBackupFileName = sys_get_temp_dir().'/'."__DB__-%Y-%m-%d";
 	$sBackupFile =  utils::ReadParam('backup_file', $sDefaultBackupFileName, true, 'raw_data');
 
-	$oConfig = GetConfig();
-
-	$sBackupFile = str_replace('__HOST__', $oConfig->Get('db_host'), $sBackupFile);
-	$sBackupFile = str_replace('__DB__', $oConfig->Get('db_name'), $sBackupFile);
-	$sBackupFile = str_replace('__SUBNAME__', $oConfig->Get('db_subname'), $sBackupFile);
-	
-	if (is_null($iRefTime))
-	{
-		$sBackupFile = strftime($sBackupFile);
-	}
-	else
-	{
-		$sBackupFile = strftime($sBackupFile, $iRefTime);
-	}
+	$oBackup = new DBBackup();
+	$oDateTime = $iRefTime !== null ? new DateTime($iRefTime) : new DateTime();
+	$sBackupFile = $oBackup->MakeName($sBackupFile, $oDateTime);
 
 	return $sBackupFile;
 }
diff --git a/datamodels/2.x/itop-backup/main.itop-backup.php b/datamodels/2.x/itop-backup/main.itop-backup.php
index 877025c03..e45037bfe 100644
--- a/datamodels/2.x/itop-backup/main.itop-backup.php
+++ b/datamodels/2.x/itop-backup/main.itop-backup.php
@@ -163,8 +163,7 @@ class BackupExec extends AbstractWeeklyScheduledProcess
 			//
 			$oBackup->SetMySQLBinDir(MetaModel::GetConfig()->GetModuleSetting($this->GetModuleName(), 'mysql_bindir', ''));
 
-			$sBackupFileFormat = MetaModel::GetConfig()->GetModuleSetting($this->GetModuleName(), 'file_name_format',
-				'__DB__-%Y-%m-%d_%H_%M');
+			$sBackupFileFormat = MetaModel::GetConfig()->GetModuleSetting($this->GetModuleName(), 'file_name_format', '__DB__-%Y-%m-%d_%H_%M');
 			$sName = $oBackup->MakeName($sBackupFileFormat);
 			if ($sName == '')
 			{
diff --git a/datamodels/2.x/itop-backup/restore.php b/datamodels/2.x/itop-backup/restore.php
index 2f0ff6e9f..00a50d998 100644
--- a/datamodels/2.x/itop-backup/restore.php
+++ b/datamodels/2.x/itop-backup/restore.php
@@ -69,7 +69,7 @@ function Usage($oP)
 		$oP->p('auth_user: login, must be administrator');
 		$oP->p('auth_pwd: ...');
 	}
-	$oP->p('backup_file [optional]: name of the file to store the backup into. Follows the PHP strftime format spec. The following placeholders are available: __HOST__, __DB__, __SUBNAME__');
+	$oP->p('backup_file [optional]: name of the file to store the backup into. Follows the PHP strftime() (https://www.php.net/manual/fr/function.strftime.php) format spec. The following placeholders are available: __HOST__, __DB__, __SUBNAME__');
 	$oP->p('mysql_bindir [optional]: specify the path for mysql executable');
 
 	if (utils::IsModeCLI())
@@ -131,7 +131,7 @@ function ExecuteMainOperation($oP){
 		exit;
 	}
 
-// Interpret strftime specifications (like %Y) and database placeholders
+	// Interpret strftime() specifications (like %Y) and database placeholders
 	$oRestore = new MyCliRestore($oP);
 	$oRestore->SetMySQLBinDir(MetaModel::GetConfig()->GetModuleSetting('itop-backup', 'mysql_bindir', ''));
 
diff --git a/setup/backup.class.inc.php b/setup/backup.class.inc.php
index e0448b9ff..2d0fb0461 100644
--- a/setup/backup.class.inc.php
+++ b/setup/backup.class.inc.php
@@ -146,18 +146,35 @@ class DBBackup
 	/**
 	 * Create a normalized backup name, depending on the current date/time and Database
 	 *
-	 * @param string sNameSpec Name and path, eventually containing itop placeholders + time formatting specs
+	 * @param string sNameSpec Name and path, eventually containing itop placeholders + time formatting following the strftime() format {@link https://www.php.net/manual/fr/function.strftime.php}
+	 * @param \DateTime|null $oDateTime Date time to use for the name
 	 *
 	 * @return string
+	 * @since 3.1.0 N°5279 Add $oDtaeaTime parameter
 	 */
-	public function MakeName($sNameSpec = "__DB__-%Y-%m-%d")
+	public function MakeName($sNameSpec = "__DB__-%Y-%m-%d", DateTime $oDateTime = null)
 	{
+		if ($oDateTime === null) {
+			$oDateTime = new DateTime();
+		}
+
 		$sFileName = $sNameSpec;
 		$sFileName = str_replace('__HOST__', $this->sDBHost, $sFileName);
 		$sFileName = str_replace('__DB__', $this->sDBName, $sFileName);
 		$sFileName = str_replace('__SUBNAME__', $this->sDBSubName, $sFileName);
-		// Transform %Y, etc.
-		$sFileName = strftime($sFileName);
+
+		// Transform date/time placeholders (%Y, %m, etc)
+		// N°5279 - As of PHP 8.1 strftime() is deprecated so we use \DateTime::format() instead
+		//
+		// IMPORTANT: We can't use \DateTime::format() directly on the whole filename as it would also format characters that are not supposed to be. eg. "__DB__-Y-m-d-production" would become "itopdb-2023-02-09-+01:00Thu, 09 Feb 2023 11:34:01 +0100202309"
+		$sFileName = preg_replace_callback(
+			'/(%[a-zA-Z])/',
+			function ($aMatches) use ($oDateTime) {
+				$sDateTimeFormatPlaceholder = utils::StrftimeFormatToDateTimeFormat($aMatches[0]);
+				return $oDateTime->format($sDateTimeFormatPlaceholder);
+			},
+			$sFileName,
+		);
 
 		return $sFileName;
 	}
diff --git a/tests/php-unit-tests/unitary-tests/application/utilsTest.php b/tests/php-unit-tests/unitary-tests/application/utilsTest.php
index 2dcc902b3..0e505fa4c 100644
--- a/tests/php-unit-tests/unitary-tests/application/utilsTest.php
+++ b/tests/php-unit-tests/unitary-tests/application/utilsTest.php
@@ -423,6 +423,35 @@ class utilsTest extends ItopTestCase
 		];
 	}
 
+	/**
+	 * @dataProvider StrftimeFormatToDateTimeFormatProvider
+	 * @covers \utils::StrftimeFormatToDateTimeFormat
+	 *
+	 * @param string $sInput
+	 * @param string $sExpectedFormat
+	 *
+	 * @return void
+	 */
+	public function testStrftimeFormatToDateTimeFormat(string $sInput, string $sExpectedFormat)
+	{
+		$sTestedFormat = utils::StrftimeFormatToDateTimeFormat($sInput);
+		$this->assertEquals($sExpectedFormat, $sTestedFormat, "DateTime format transformation for '$sInput' doesn't match. Got '$sTestedFormat', expected '$sExpectedFormat'.");
+	}
+
+	public function StrftimeFormatToDateTimeFormatProvider(): array
+	{
+		return [
+			'Standard date time' => [
+				'%Y-%m-%d %H:%M:%S',
+				'Y-m-d H:i:s',
+			],
+			'All placeholders' => [
+				'%d | %m | %y | %Y | %H | %M | %S | %a | %A | %e | %j | %u | %w | %U | %V | %W | %b | %B | %h | %C | %g | %G | %k | %I | %l | %p | %P | %r | %R | %T | %X | %z | %Z | %c | %D | %F | %s | %x | %n | %t | %%',
+				'd | m | y | Y | H | i | s | D | l | j | z | N | w | %U | W | %W | M | F | M | %C | y | Y | G | h | g | A | a | h:i:s A | H:i | H:i:s | %X | O | T | %c | m/d/y | Y-m-d | U | %x | %n | %t | %',
+			],
+		];
+	}
+
 	/**
 	 * @dataProvider ToCamelCaseProvider
 	 * @covers       utils::ToCamelCase
diff --git a/tests/php-unit-tests/unitary-tests/setup/DBBackupTest.php b/tests/php-unit-tests/unitary-tests/setup/DBBackupTest.php
index 68d7df646..c8693ed24 100644
--- a/tests/php-unit-tests/unitary-tests/setup/DBBackupTest.php
+++ b/tests/php-unit-tests/unitary-tests/setup/DBBackupTest.php
@@ -4,6 +4,7 @@ namespace Combodo\iTop\Test\UnitTest\Setup;
 
 use CMDBSource;
 use Combodo\iTop\Test\UnitTest\ItopTestCase;
+use DateTime;
 use DBBackup;
 use utils;
 
@@ -102,4 +103,45 @@ class DBBackupTest extends ItopTestCase
 		}
 		$this->assertStringEndsWith('--ssl-ca='.DBBackup::EscapeShellArg($sTestCa), $sCliArgsCapathCfg);
 	}
+
+	/**
+	 * @dataProvider MakeNameProvider
+	 * @covers \DBBackup::MakeName
+	 *
+	 * @param string $sInputFormat
+	 * @param \DateTime $oBackupDateTime
+	 * @param string $sExpectedFilename
+	 *
+	 * @return void
+	 */
+	public function testMakeName(string $sInputFormat, DateTime $oBackupDateTime, string $sExpectedFilename): void
+	{
+		$oBackup = new DBBackup(utils::GetConfig());
+		$sTestedFilename = $oBackup->MakeName($sInputFormat, $oBackupDateTime);
+
+		$this->assertEquals($sExpectedFilename, $sTestedFilename, "Backup filename for '$sInputFormat' format doesn't match. Got '$sTestedFilename', expected '$sExpectedFilename'.");
+	}
+
+	public function MakeNameProvider(): array
+	{
+		$oBackupDateTime = DateTime::createFromFormat('Y-m-d H:i:s', '1985-07-30 15:30:59');
+
+		return [
+			'Default format' => [
+				'itopdb-%Y-%m-%d',
+				$oBackupDateTime,
+				'itopdb-1985-07-30',
+			],
+			'With time which is a placeholder that needs to be translated (minutes defined by "%M" when its actually "i" in the transformation matrix)' => [
+				'itopdb-%Y-%m-%d_%H:%M:%S',
+				$oBackupDateTime,
+				'itopdb-1985-07-30_15:30:59',
+			],
+			'With user defined string that would be translated if using \DateTime::format() directly' => [
+				'itopdb-%Y-%m-%d-production',
+				$oBackupDateTime,
+				'itopdb-1985-07-30-production',
+			],
+		];
+	}
 }