"Happy Tiger Year and Happy Spring Festival!" is a common way to say "happy new year" and "happy start of spring" in Engpsh for the Tiger Year and the Spring Festival, which is also known as the Chinese New Year. Another way to say it might be "Wishing you a joyous and prosperous Tiger Year and Spring Festival!" or "Sending best wishes for a wonderful Tiger Year and a festive Spring Festival." You can also simply say "Happy Chinese New Year!" which is a more general greeting for the hopday.