The flag for Heard & McDonald Islands, which may show as the letters HM on some platforms. This is the same flag as Australia.
The Flag: Heard & McDonald Islands emoji is a flag sequence combining ? Regional Indicator Symbol Letter H and ? Regional Indicator Symbol Letter M. These display as a single emoji on supported platforms.
Flag: Heard & McDonald Islands was added to Emoji 1.0 in 2015.
U+1F1ED
U+1F1F2
?? Regional indicator symbol letter h
?? Regional indicator symbol letter m