With version 5.x better-logging now adheres to the ISO8601 standard for dates and time stamps. This brings with it some changes to the message formatting context object.
The string format of ctx.date has changed from DD/MM/YYYY to YYYY-MM-DD.
The introduction of a unified ctx.time has rendered ctx.time12 and ctx.time24 redundant, and they have there for been removed. The string format of the new unified ctx.time is as follows hh:mm:ss.mmm where the additional mmm at the end stands for milliseconds.