An Islamic teacher who covers her face with a niqab has written a poem describing Valentine's Day as immoral.

Muslim convert Umm Jamaal ud-Din, who is based in western Sydney, told her 18,357 Facebook followers to avoid the annual day of romance.

Using the hashtag '#SayNoToValentinesDay', she mocked Roses are Red-style love poems.

'Roses are red, violets are blue, celebrating Valentine's Day is from what the immoral people do,' she said.

The religious instructor, also known as Mouna Parkin, made her denunciation of Valentine's Day next to an image of a moral values sign in a Muslim fashion store.

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