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Too Much Time On My Hands: Why Do We Have Leap Years?

David K. Israel explained the leap second the other day, so in the last few hours of this leap year, let's also look at that extra day we had way back in February.

Our average calendar year (the usual 365 days) is a little out of sync with the astronomical year "“ the 365 days, 5 hours, 48 minutes and 46 seconds it takes the earth to go once around the sun. That little chunk of extra time doesn't seem like much (you could probably let 5 hours, 48 minutes and 46 seconds slip by while reading this blog), but over time it adds up. Every four common calendar years, the calendar would be about a full day behind of the astronomical year. As time went on (we're talking a few hundred years), our calendar months would start to fall earlier in the year. We'd have Christmas in the summer and Fourth of July barbecues in the dead of winter. It would be chaos.

To prevent that drift and keep the calendar and astronomical years in sync, we created the leap year and add one extra day to the calendar every four years (most of the time, we'll get to that in a minute). Over a four year period, then, we average 365.25 days per year and just about keep pace with the astronomical year. But a solar year is just shy of 365.25 days "“ 365.2422 days, actually "“ so if we added a leap day strictly every four years, we'd eventually get ahead of the astronomical calendar and months would fall later in the year.

To prevent that other drift, we space our leap years out by the following rules:

1. Years divisible by 4 are leap years (e.g. 2008).

2. Years divisible by 4 and 100 are not leap years (e.g. 1900), unless"¦

3. Those years are also divisible by 400 (e.g. 2000), in which case, they are leap years.

In the long run, then, we average 365.2425 days in a year, which is close enough to the astronomical year that it will take over 3,000 years for the calendar and astronomical years to be off by a day.

If you've got a burning question that you'd like to see answered here, shoot me an email at flossymatt (at) gmail.com. Twitter users can also make nice with me and ask me questions there. Be sure to give me your name and location (and a link, if you want) so I can give you a little shout out.

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5 Subtle Cues That Can Tell You About Your Date's Financial Personality
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Being financially compatible with your partner is important, especially as a relationship grows. Fortunately, there are ways you can learn about your partner’s financial personality in a relationship’s early stages without seeing their bank statement or sitting them down for “the money talk.”

Are they a spender or a saver? Are they cautious with money? These habits can be learned through basic observations or casual questions that don’t feel intrusive. Here are some subtle things that can tell you about your date’s financial personality.

1. HOW THEY ANSWER BASIC MONEY QUESTIONS.

Casual conversations about finance-related topics can be very revealing. Does your date know if their employer matches their 401(k) plan contributions? Do you find their answers to any financial questions a bit vague—even the straightforward ones like “What are the rewards like on your credit card?” This could mean that your partner is a little fuzzy on some of the details of their financial situation.

As your connection grows, money talks are only natural. If your date expresses uncertainty about their monthly budget, it may be an indicator that they are still working on the best way to manage their finances or don’t keep close tabs on their spending habits.

2. WHAT THEY’RE WATCHING AND READING.

If you notice your partner is always watching business news channels, thumbing through newspapers, or checking share prices on their phone, they are clearly keeping abreast of what’s going on in the financial world. Ideally, this would lead to a well-informed financial personality that gives way to smart investments and overall monetary responsibility.

If you see that your date has an interest in national and global finances, ask them questions about what they’ve learned. The answers will tell you what type of financial mindset to expect from you partner moving forward. You might also learn something new about the world of finance and business!

3. WHERE THEY GET THEIR FOOD.

You may be able to learn a lot about someone’s financial personality just by asking what they usually do for dinner. If your date dines out a lot, it could be an indication that they are willing to spend money on experiences. On the other hand, if they’re eating most of their meals at home or prepping meals for the entire week to cut their food budget, they might be more of a saver.

4. WHETHER THEY’RE VOICING MONEY CONCERNS.

Money is a source of stress for most people, so it’s important to observe if financial anxiety plays a prominent role in your date’s day-to-day life. There are a number of common financial worries we all share—rising insurance rates, unexpected car repairs, rent increases—but there are also more specific and individualized concerns. Listen to how your date talks about money and pick up on whether their stress is grounded in worries we all have or if they have a more specific reason for concern.

In both instances, it’s important to be supportive and helpful where you can. If your partner is feeling nervous about money, they’ll likely be much more cautious about what they’re spending, which can be a good thing. But it can also stop them from making necessary purchases or looking into investments that might actually benefit them in the future. As a partner, you can help out by minimizing their expenses for things like nights out and gifts in favor of less expensive outings or homemade gifts to leave more of their budget available for necessities.

5. HOW THEY HANDLE THE BILL.

Does your date actually look at how much they’re spending before handing their credit card to the waiter or bartender at the end of the night? It’s a subtle sign, but someone who looks over a bill is likely much more observant about what they spend than someone who just blindly hands cards or cash over once they get the tab.

Knowing what you spend every month—even on smaller purchases like drinks or dinner—is key when you’re staying on a budget. It’s that awareness that allows people to adjust their monthly budget and calculate what their new balance will be once the waiter hands over the check. Someone who knows exactly what they’re spending on the small purchases is probably keeping a close eye on the bigger picture as well.

REMEMBER THERE’S NO SUBSTITUTE FOR TALKING.

While these subtle cues can be helpful signposts when you’re trying to get an idea of your date’s financial personality, none are perfect indicators that will be accurate every time. Our financial personalities are rarely cut and dry—most of us probably display some behaviors that would paint us as savers while also showing habits that exclaim “spender!” By relying too heavily on any one indicator, we might not get an accurate impression of our date.

Instead, as you get to know a new partner, the best way to learn about their financial personality is by having a straightforward and honest talk with them. You’ll learn more by listening and asking questions than you ever could by observing small behaviors.

Whatever your financial personality is, it pays to keep an eye on your credit score. Discover offers a Free Credit Scorecard, and checking it won't impact your score. It's totally free, even if you aren't a Discover customer. Check yours in seconds. Terms apply. Visit Discover to learn more.

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Animals
Where Do Birds Get Their Songs?
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Birds display some of the most impressive vocal abilities in the animal kingdom. They can be heard across great distances, mimic human speech, and even sing using distinct dialects and syntax. The most complex songs take some practice to learn, but as TED-Ed explains, the urge to sing is woven into songbirds' DNA.

Like humans, baby birds learn to communicate from their parents. Adult zebra finches will even speak in the equivalent of "baby talk" when teaching chicks their songs. After hearing the same expressions repeated so many times and trying them out firsthand, the offspring are able to use the same songs as adults.

But nurture isn't the only factor driving this behavior. Even when they grow up without any parents teaching them how to vocalize, birds will start singing on their own. These innate songs are less refined than the ones that are taught, but when they're passed down through multiple generations and shaped over time, they start to sound similar to the learned songs sung by other members of their species.

This suggests that the drive to sing as well as the specific structures of the songs themselves have been ingrained in the animals' genetic code by evolution. You can watch the full story from TED-Ed below, then head over here for a sample of the diverse songs produced by birds.

[h/t TED-Ed]

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