It’s probably no surprise to hear that spring is the best time of the year to put your house on the market, but new data appears to have figured out how to pinpoint the perfect listing time down to the week.

Zillow took a look at the country’s 25 largest metro markets and crunched their internal numbers to determine the specific timeframe when smart sellers want to try to target their listings. In many of the major California markets, that time is rapidly approaching.

Per their research, the best time to list your home in Riverside, San Diego, and Sacramento is between April 1 and 15. During that key timeframe, Zillow sees a $3,400 sales boost in Riverside, $6,200 jump in San Diego, and $6,600 uptick in Sacramento.

Meanwhile in the Los Angeles-Long Beach-Anaheim region, your best bet is to list between April 16 and 30; Zillow notes a $5,600 higher sales number on average during that time. 

San Jose residents want to hold off a bit longer until the first half of May while San Francisco homeowners want to target the second half of May. San Franciscans are looking at an additional $10,200 on average while San Jose sellers average a whopping $14,900 boost during that time.

Of course these numbers are averages and not guarantees, but if you’re hedging your bets it’s not a bad way to go. It’s also a good way for buyers to be on the lookout for a boost in housing inventory, even if it means they might have to pay a little bit more.