Calendar-based drinking rules like "I only drink on weekends" are among the most popular self-regulation strategies, but research shows they often backfire. A study in Addictive Behaviors (2017) found that rigid, time-based rules frequently lead to compensatory overconsumption — people drink more per session on their "allowed" days to make up for abstaining during the week. The net weekly consumption often remains unchanged or even increases. The psychological mechanism is called the licensing effect: having a strict rule creates a sense of earned permission ("I was good all week, so I deserve to go hard tonight"). This binary on/off thinking is particularly problematic because it removes the concept of moderation — when "allowed" to drink, there's no internal limit because the rule only governs when, not how much. Weekend-only rules also ignore context. A Tuesday birthday dinner or a Wednesday business event creates tension: break the rule and feel guilty, or follow it rigidly and miss social opportunities. Research on self-regulation shows that rules perceived as restrictive trigger psychological reactance — an unconscious desire to do exactly what's forbidden. More effective approaches use flexible guardrails instead of rigid rules. Examples include: setting a weekly unit budget (e.g., 14 units/week) that can be distributed across any days, establishing per-session maximums (e.g., no more than 4 drinks in one sitting), or targeting a minimum number of drink-free days per week rather than specifying which days. AlcoInsights supports all of these flexible goal types, including weekly limits, per-session caps, drink-free day targets, and rolling-period tracking. Sources: Addictive Behaviors (2017), WHO guidelines on alcohol reduction, De Witt Huberts et al. (2014) "The Licensing Effect" — PubMed.