Ideas:

1. In yesterday's newspaper I read that St Valentine's Day soon will be here, the 14th of February. Checking up on this I found that Valentinus was the name of two Italian saints whose festival falls on this day. But nowadays the customs around this festival has spread around the globe, e.g. do the Japanese give white chocolate to their women.

But the newspaper also has another explanation: the turtle doves begin their pairing-time. Is it a coincidence that the young birds in the glyph above also seem to be placed in this season of the year, as seen in the calendar from the Easter Island?

2. Counting days (nights) I reach 31 + 14 = 45 from the beginning of the year. That is 1/8 of the total circle (if we regard 360 as a year). St Valentine's Day is a cardinal point if we divide the year in 8.

With 28 periods of 13 nights (= 364) division with 8 results in 45 ½ nights. The glyph above is located in the 4th period which stretches through the nights 40-52 (as calculated by me in a preliminary manner). It all agrees well so far.