Valentine's Day falls on February 14. It has always fallen on February 14. By now the date should be burned in your memory. And yet, a sizeable chunk of lovers continuously forget that they're supposed to do something romantic and/or thoughtful until the very last minute. Tch.

The phrase "scheduled sex" evokes dread for most couples. We have the idea that sex is always supposed to be spontaneous, so making the decision to schedule sex feels like an admission that your sex life is officially dead. But scheduled sex actually be way more fun than you think. Here's how.

We've all been trapped in that vicious cycle: "What do you want to do tonight?" "I dunno, what do you wanna do?" It's frustrating. Keep an always up to date list of potential activities so you spend time doing fun things instead of just talking about them.

If you've got a bunch of dates in US mm/dd/yyyy format and need to convert them into Australia's dd/mm/yyyy format (or vice-versa), it can be hard to know where to start. Office expert Helen Bradley details how you can work through that process in Excel.

Another handy use case for Wolfram Alpha: enter a date such as September 8, 1980 and it will immediately tell you it was a Monday.

Working out the number of Mondays in a month isn't too hard. Working out how many fall between two dates is trickier. The Mr Excel video series offers two ways to get that task done automatically with a formula.