+/**
+ * Try to localize a given date/time in seconds from Unix epoch, pass through string if invalid
+ *
+ * Allows compatibility with date/time fields that may or may not be in Unix epoch format,
+ * localizing if possible, leaving alone if not.
+ *
+ * @param possibleEpochDate Date/time that might be in seconds since Unix epoch format
+ * @param dateFormat Desired format of the date/time string
+ * @param useUTC If true, use UTC timezone, otherwise use local time
+ * @return Localized date/time if parse succeeded, otherwise the source string
+ */
+COMMON_EXPORT QString tryFormatUnixEpoch(const QString& possibleEpochDate,
+ Qt::DateFormat dateFormat = Qt::DateFormat::TextDate,
+ bool useUTC = false);
+
+/**
+ * Format the given date/time in ISO 8601 format with timezone offset