Update date util func
Update date util func

tyrken/alertmanager,Kellel/alertmanager,tyrken/alertmanager,Aloomaio/alertmanager,joehandzik/alertmanager,Kellel/alertmanager,GoogleCloudPlatform/alertmanager,prometheus/alertmanager,tinytub/alertmanager,stuartnelson3/am-ui,GoogleCloudPlatform/alertmanager,joehandzik/alertmanager,tinytub/alertmanager,joehandzik/alertmanager,Aloomaio/alertmanager,stuartnelson3/am-ui,GoogleCloudPlatform/alertmanager,prometheus/alertmanager,tyrken/alertmanager,prometheus/alertmanager,tyrken/alertmanager,tinytub/alertmanager,Kellel/alertmanager,Aloomaio/alertmanager,GoogleCloudPlatform/alertmanager,prometheus/alertmanager