Get Previous Working Date

Apart from performing simple calculations with dates, some scenarios may require more complex logic to get the desired results. Using datetime and conditional nodes, you can make calculations based on specific conditions, such as calculating the previous working day.

What Get Previous Working Date can do

• Robomotion.DateTime.Now with optLayout: 'RFC3339' and optTimezoneOffset: 'Local' → msg.today.
• Robomotion.DateTime.Split on msg.today → msg.today_parts (exposes .weekday).
• Compute Day Offset (Core.Programming.Function) — sets msg.day_offset to -2 on Sunday, -3 on Monday, otherwise -1.
• Robomotion.DateTime.Add with optDurationUnit: 'Days' and inDuration: msg.day_offset → msg.previous_working_day.
• Robomotion.DateTime.Split on msg.previous_working_day → msg.previous_parts; Robomotion.DateTime.Format with optCustomOutLayout: 'January' → msg.month_name.
• Build Dialog Text (Core.Programming.Function) assembles msg.dialog_text as Day / Month / Year, then Core.Dialog.MessageBox shows the result before Core.Flow.Stop.

Behind the scenes

• The weekday branches collapse into a single Function node (Compute Day Offset) that returns the numeric offset, so one Robomotion.DateTime.Add handles all three cases instead of three parallel branches.
• Robomotion.DateTime.Split exposes .day, .year, and .weekday as structured fields, avoiding any string parsing of the RFC3339 value.
• The custom format layout January (Go-style reference date) yields the full month name, matching the MMMM pattern from the source tutorial.