A day with good flow.
No matter how much effort,
When everything works.
Law. In-laws. A way of referring to one's relations by marriage--mother-in-law, sisters-in-law, etc. In-law is short for in Canon law, the reference being to the degrees of affinity within which marriage is allowed or prohibited. *
Brewer's Dictionary of Phrase and Fable, 1963, p 537.
*Found looking for Lawks, which was not there, sadly.