Night both times. With my first, things started to get going around 10 in the morning, by 10 at night it was bad and I went into the hospital, laboured all night and she was finally born at 10:13 in the morning. With my second, I lost my mucus plug in the morning and things really started at 7 that evening. It was horrible by about 1 am, so I went into the birthing centre and had her at 3:28 am.