Comment by stouset

What's the issue with having a span represent "one year and two months"? Both involve a variable number of days (365-366 and 28-31), but I would hope you could store the components separately so it can be unambiguously applied once given a specific moment in time.

I'm thinking something along the lines of how ActiveSupport::Duration works:

    >> 4.years + 5.months + 3.weeks + 2.days + 1.hour + 4.minutes + 10.seconds
    => 4 years, 5 months, 3 weeks, 2 days, 1 hour, 4 minutes, and 10 seconds

Of course the downside being that it would need to be sized large enough to contain each component, even though they may be rarely used.