That just seems wrong... christmas is the pagan festival of light: its meant to be celbrated at the beginning of winter, the equinox...
In the northern hemisphere:
21st of december is the longest night of the year.. the day of longest darkness = symbolic "death" of the sun, the bringer of light (god's "son")
25th of december: the sun begins his reascent in the heavens to a higher level in the sky (symbolic "rebirth" of the sun, or "resurrection" of god's "son" after three days of death, astrologically "aided" by the "three kings" or orion's belt and the brightet star in the sky, sirius, whom the three kings follow on their path along the night sky)
5th of december is the end of Christmas, thats twelve days of christmas = twelve months or twelve moon-cycles.... add the three days of the sun's death to the twelve days = 15 days to the end of the yule period since beginning of winter.... 15 days is the time for the moon to go from new to full = symbol of return of light after dark...
During christmas, we utilise two colours .. red = fire = the sun.... green = plants = life on earth
It will come as no surprise now that the celeberation is accompanied with pine trees (evergreens = everlasting life through the darkness) that are decorated with lights (to commemorate the return of light to earth
So to be celebrating the pagan festival of light in the summer in the southern hemisphere... is just completely inapproppriate