The Chinese zodiac assigns each year one of twelve animals, and the calculator returns the animal for a date of birth along with the associated element. Animals and elements together make a cycle of sixty years rather than twelve, so the full combination repeats only once in a lifetime for most people.
The trap is the start of the year, and almost every quick lookup gets it wrong. The Chinese year does not begin on 1 January but on the second new moon after the winter solstice, which falls somewhere between 21 January and 20 February. Anyone born in January or in the first half of February belongs to the previous year's animal, not the one the calendar year suggests. This calculator uses the actual lunisolar boundary for the year in question rather than a fixed date.
The calendar is a useful contrast with the Hijri one used alongside the Gregorian in the UAE. Both track the moon, but the Chinese system inserts a leap month roughly every three years to keep itself tied to the seasons, which is why Chinese New Year always lands in late winter. The Hijri calendar inserts nothing, which is why its dates travel through the whole year. Dubai's large Chinese community means both new years are marked here, several weeks and one entire calendar principle apart.