New parents who struggle with alcohol addiction may want to take extra steps to ensure that their children are cared for this New Year’s Eve, which may include seeking substance abuse help. A new study has found that the number of sudden infant death syndrome (SIDS) cases spikes on New Year’s Day.

A team of researchers from the University of California, San Diego analyzed death certificates of 129,000 infants who died between 1973 and 2006. They found that the number of SIDS cases increases by as much as 33 percent on New Year’s Day.

Similarly, the team noted an increase in SIDS on weekends, the Fourth of July and April 20 - a day that many individuals use to celebrate cannabis. However, the increase in SIDS cases on these days was far less dramatic than the New Year’s uptick.

The researchers speculated that heavy alcohol consumption may impair the ability of parents to provide adequate care for their newborns. In particular, they said that parents may forget to turn their babies over onto their back while they sleep, which is known to contribute to SIDS.