March 1 is a very important day here in Amsterdam because that's the day the cafe owners put out their tables and chairs for the year. Just yesterday this sea of tables at Leidseplein was a skating rink flanked by stalls serving comfy Dutch winter fare like warm waffles and oliebollen. These chairs will remain until the last of the summer tourists pack their tulip bulbs and go home. Not many takers today. Evidently nobody informed the gray skies over Amsterdam that today was March 1.