formatMonthYear
Format a given monthMillis to a string representation of the month and the year (i.e. January 2023).
Return
The String that represents the time of give date and locale. If input time is invalid or it doesn't support this formatting, it will return null.
Parameters
monthMillis
Timestamp in UTC milliseconds from the epoch that represents the month, or null when no month is available to format.
locale
A Locale to use when formatting the month and year.