Tracking Shabbat Candles in a Texas City
Most people think knowing when Shabbat begins is as simple as checking a sunrise app. That assumption breaks down the moment you live in Houston. The city stretches forty miles east to west across four time zones of humidity and traffic patterns that make any single time reference feel arbitrary. I learned this the hard way after driving from Sugar Land to The Woodlands on a Friday evening, convinced the sunset time I had written on my hand was correct for my current location. It wasn't. The phrase sounds like marketing copy, but it points to something practically necessary. Houston has a large and growing Jewish population spread across Houston Heights, Memorial, Jersey Village, and the suburbs radiating outward. Synagogues in those neighborhoods follow slightly different customs. Some light candles eighteen minutes before sunset. Others wait twenty minutes. A few follow the opinion of Rabbi Moshe Feinstein and use a fixed calculation based on the geonica method rather than actual astronomical observation. Without a reliable source, you are guessing. And guessing on Friday afternoon is stressful when your children are already in the car. I keep a spreadsheet tracking which synagogue follows which practice. It started three years ago when my wife asked me why I was checking three different websites before lighting. The answer was that my mother-in-law in Katy uses different halachic opinions than my rabbi in Greater Greenspoint. The spreadsheet lives on my phone now. It has forty-two entries and updates automatically when the Hebrew Calendar API changes. Most people do not need this level of detail. But if you move to Houston from a smaller city where everyone shares the same minyan, the difference between fourteen and eighteen minutes feels arbitrary until you have missed kiddush because you arrived early.
How Shabbat Times Actually Work
Sunset in Houston varies from 5:38 PM in December to 8:26 PM in June. That is nearly three hours of variation across the calendar year. Shabbat begins at sunset on Friday evening and ends at nightfall on Saturday. Nightfall occurs when three stars become visible, which in Houston usually means forty minutes after sunset during the summer and twenty minutes during the winter. These numbers come from the Talmud and were refined by medieval French rabbis who lived in cities with similar latitude to our own. They did not account for atmospheric refraction at the equator, which is why some authorities add extra minutes during Texas summers. The most common method in Houston synagogues is shema vetzeit, which means Shabbat begins when the evening prayer is recited. This usually happens eighteen minutes before actual sunset. The eighteen-minute rule comes from the Shulchan Aruch and represents the opinion of the Rema. Some congregations follow the Mishnah Berurah and use twenty minutes instead. A few follow the Chazon Ish and wait twenty-five minutes. The difference between these opinions matters when you are hosting guests who came from different communities. My neighbor from Buffalo lights at twelve minutes before sunset. My rabbi in Houston uses eighteen. They have never agreed on this number and it has not damaged our friendship, but it makes potluck logistics awkward.
What Happens When You Get It Wrong
I once drove from Sugar Land to the Heights on a Friday at 6:42 PM, checked my phone, and realized I had used the wrong source. The sunset time I trusted was for a different latitude and did not account for the Houston sky being hazy from Gulf moisture. By the time I pulled into the synagogue parking lot, the sun had already set for another twenty minutes. My hands were clean, but my Shabbat calculations were off. I missed the first part of kiddush and sat through the entire service feeling like an intruder. The rabbi nodded politely, but I could tell he noticed I had arrived early by my own inaccurate standards. This is not a dramatic story. It is a practical problem that affects thousands of people in Houston every week. The solution is to find a single reliable source and stick with it. Most synagogues post their Shabbat times on their websites. Some use online calculators. A few rely on printed calendars. The best approach is to ask your rabbi which method your congregation follows and write it down. Do this before Friday afternoon when you are rushing to change clothes and check the oven. Most people forget to do this and end up guessing, which is exactly the problem I described earlier.
Get the Full Details
Edge Cases That Trip People Up
Houston has a unique problem with Daylight Saving Time. The city observes DST, but not all synagogues adjust their Shabbat calculations the same way. Some keep their clocks on standard time year-round and subtract sixty minutes from their sunset times during the summer. Others switch completely and add sixty minutes. The result is that two synagogues ten miles apart may light candles at completely different times during March and October. I learned this when my wife's sister visited from Israel and could not understand why we were lighting candles before she arrived. She had no concept of Houston's chaotic approach to time zones and DST. Another problem is atmospheric refraction. Houston's humid air bends sunlight more than dry air does, which means the sun appears above the horizon for several extra minutes even after it has geometrically set. Some authorities account for this by adding extra minutes to their Shabbat calculations. Others ignore it and follow the standard rema opinion. The difference usually ranges from zero to five minutes, depending on your source. Most people do not notice this variation. But if you are keeping meticulous track of Shabbat times, the difference between my source and yours can be measured in seconds.
What I Use Now
My current system involves three sources. The first is the Orthodox Union's Shabbat calculator, which I trust because it uses the geonica method and accounts for Houston's latitude. The second is my rabbi's published schedule, which I check whenever the OU calendar changes. The third is a printed calendar from the synagogue, which I keep in case my phone dies or the internet goes down during a storm. Most people do not need this level of redundancy. But if you live in Houston, where storms knock out power regularly and cell towers get overwhelmed during emergencies, having a backup source is practical rather than obsessive. I also keep a list of nearby synagogues and their practices. It started as a favor to my wife, who does not want to arrive early to shul and miss the first aliyah. The list has forty-two entries and updates automatically when a congregation changes its minhag. Most people do not need this list. But if you move to Houston from a city where everyone shares the same custom, the list becomes useful within a week. I wish I had made one before my first Friday in the Heights, when I arrived early and sat through the entire service feeling lost. The mistake was not my fault. It was Houston's fault, because nobody told me the suburbs followed different customs than the city center.
