My Heritage DNA has a Mother's Day discount on its autosomal DNA test. It's valid in North America, where Mother's Day is held on Sunday 13 May, and Ireland/UK (where it's celebrated in March, but who's checking), paying in US dollars or Sterling respectively.
The offer for North American residents is a $10 discount, reducing the price from $69 to $59.
The offer for Ireland and UK residents is a £16 discount, reducing the price from £75 to £59.
Shipping costs are extra.
The North American offer ends on Monday 14 May. I haven't seen an end date for the IE/UK offer. Presumably it's the same.