fixed month value

lib/single-file/single-file-core.js

@@ -859,12 +859,12 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 			filename = await DomUtil.evalTemplateVariable(filename, "date-locale", () => date.toLocaleDateString());
 			filename = await DomUtil.evalTemplateVariable(filename, "time-locale", () => date.toLocaleTimeString());
 			filename = await DomUtil.evalTemplateVariable(filename, "day-locale", () => String(date.getDate()).padStart(2, "0"));
-			filename = await DomUtil.evalTemplateVariable(filename, "month-locale", () => String(date.getMonth()).padStart(2, "0"));
+			filename = await DomUtil.evalTemplateVariable(filename, "month-locale", () => String(date.getMonth() + 1).padStart(2, "0"));
 			filename = await DomUtil.evalTemplateVariable(filename, "year-locale", () => String(date.getFullYear()));
 			filename = await DomUtil.evalTemplateVariable(filename, "datetime-locale", () => date.toLocaleString());
 			filename = await DomUtil.evalTemplateVariable(filename, "datetime-utc", () => date.toUTCString());
 			filename = await DomUtil.evalTemplateVariable(filename, "day-utc", () => String(date.getUTCDate()).padStart(2, "0"));
-			filename = await DomUtil.evalTemplateVariable(filename, "month-utc", () => String(date.getUTCMonth()).padStart(2, "0"));
+			filename = await DomUtil.evalTemplateVariable(filename, "month-utc", () => String(date.getUTCMonth() + 1).padStart(2, "0"));
 			filename = await DomUtil.evalTemplateVariable(filename, "year-utc", () => String(date.getUTCFullYear()));
 			filename = await DomUtil.evalTemplateVariable(filename, "hours-locale", () => String(date.getHours()).padStart(2, "0"));
 			filename = await DomUtil.evalTemplateVariable(filename, "minutes-locale", () => String(date.getMinutes()).padStart(2, "0"));