A fire started on my legs when I boot up a local AI model on my laptop during my flight home. All it took was this innocuous question: ``` I started a 3 weeks program on 2026-03-16. Generate dates from the start to the end in this format: 2026-03-16: 2026-03-17: etc ``` Yes, I know, it's inefficient to ask such a simple question to a large language model, but it's convenient. And it can't be that inefficient, can it? 👀 The short answer is my laptop turned into molten lava. The long answer is that you can read each step of the model below, which is exceedingly boring but arguably a great way to build an intuition for how amazing AI is and how wasteful it is at the same time: ``` Thought for 6 minutes 32 seconds Thinking Process: 1. **Analyze the Request:** - Start date: 2026-03-16 (March 16, 2026). - Duration: 3 weeks. - Output format: `YYYY-MM-DD:` followed by a newline for each day. - Goal: Generate dates from start to end inclusive. 2. **Determine the End Date:** - Start date: March 16, 2026. - Duration: 3 weeks = 3 * 7 days = 21 days. - Calculation: March 16 + 21 days. - March has 31 days. - Days remaining in March after start (inclusive): 31 - 16 + 1 = 16 days? No, let's just add days. - Day 0: Mar 16 - Day 7: Mar 23 - Day 14: Mar 30 - Day 21: Apr 6 (March has 31 days, so 31 - 16 = 15 days left in March. 21 - 15 = 6 days into April). - So, End Date is April 6, 2026. 3. **Verify the "3 weeks" definition:** - Usually, a program lasting "3 weeks" implies covering the duration from start to end inclusive of all days in between (21 days total). - Sometimes people mean "Week 1, Week 2, Week 3", ending on the last day of the third week. - If I count 21 days starting from March 16: - Mar 16 to Mar 22 (7 days) = Week 1 - Mar 23 to Mar 29 (7 days) = Week 2 - Mar 30 to Apr 5 (7 days) = Week 3? Or does it end on the last day of the 21st day? - Standard interpretation for "Generate dates from start to end": List every single day. - Total count: Start date + 20 subsequent days = End date. - Let's check the math again. - March 16 (Day 1) - ... - March 31 (Day 16) -> 15 days passed since start? No. - Mar 16 to Mar 22 = 7 days. - Mar 23 to Mar 29 = 7 days. - Mar 30 to Apr 5 = 7 days. - Total 21 days. - So the last date is April 6, 2026? Wait. - Let's count: - Start: Mar 16 (Day 1) - End of Week 1: Mar 22 (7 days) - End of Week 2: Mar 29 (14 days) - End of Week 3: Apr 5 (21 days)? Or is it inclusive? - If I say "I started on Monday and the program lasts 3 weeks", usually that means 21 days. - Let's calculate March 16 + 20 days = April 5. - Wait, if Day 1 is Mar 16. Day 21 is Mar 16 + 20 days. - Mar 16 + 20 days: - Days in March after 16th (inclusive): 31 - 16 = 15 days remaining? No, 16 to 31 is 16 days. - Let's use a simpler method. - Mar 16 + 20 days. - March has 31 days. - Days left in March = 31 - 16 = 15 days (Mar 17 to Mar 31). - Wait, if I start on the 16th. - Day 0: Mar 16. - Day 20: Mar 16 + 20 days. - March has 31 days. 31 - 16 = 15 days remaining in March (excluding the 16th). - So 15 days get us to March 31. - We need 20 days total offset. - 20 - 15 = 5 days into April. - So Mar 31 + 5 days = Apr 6? No. - Let's count: - Mar 17 (1) - Mar 18 (2) - ... - Mar 31 (15) - Apr 1 (16) - Apr 2 (17) - Apr 3 (18) - Apr 4 (19) - Apr 5 (20) - So Mar 16 + 20 days = April 5. - Wait, let's re-verify "Start to End". Usually means inclusive of start and end. - If duration is 3 weeks (21 days). - Start: Day 1. End: Day 21. - Offset = 20 days. - Mar 16 + 20 days = April 5, 2026. - Let's check calendar logic again. - March 16 to March 31 is 16 days (inclusive). - So if I want 21 days total. - Days in March: 16th, 17th... 31st = 16 days. - Need 5 more days. - April 1st, 2nd, 3rd, 4th, 5th. - So the last day is April 5, 2026. - Wait, earlier I calculated Apr 6. Why? - Mar 16 + 7 days = Mar 23 (End of week 1). - Mar 23 + 7 days = Mar 30 (End of week 2). - Mar 30 + 7 days = Apr 6 (End of week 3). - This implies Week 1 is Mar 16-22, Week 2 is Mar 23-29, Week 3 is Mar 30-Apr 5. - Wait, if I count 7 days starting from the 1st day: - Day 1: Mar 16 - Day 7: Mar 22 (16+6) - Day 8: Mar 23 - Day 14: Mar 29 (23+6) - Day 15: Mar 30 - Day 21: Apr 5 (30+5). - Okay, let's do the math strictly. - Start Date: March 16. - Duration: 3 weeks = 21 days. - End Date = Start Date + 20 days. - March has 31 days. - Days remaining in March after start (exclusive of start): 31 - 16 = 15 days. - Total days needed: 20 offset days. - Offset into April: 20 - 15 = 5 days. - Date is April 5, 2026. - Wait, let's check the "Week" logic again. - If I say "3 weeks", do I mean 21 days? Yes. - Does it include the start day? Yes ("from the start"). - So Day 1 to Day 21. - Mar 16 is Day 1. - Mar 16 + 20 = Apr 5. - Let's verify with a known date calculator logic mentally. - March 16 (Mon? No, need to check day of week). - Actually, I don't need the day of week, just the dates. - Mar 16 + 20 days. - Mar 16 -> Mar 31 is 15 days difference. (31-16=15). - So Mar 31 is Day 16 of the program. - Apr 1 is Day 17. - Apr 2 is Day 18. - Apr 3 is Day 19. - Apr 4 is Day 20. - Apr 5 is Day 21. - So the last date is April 5, 2026. - Wait, let's re-read "Generate dates from the start to the end". - If I say "I worked for 3 weeks", and started Monday Mar 16. - Week 1: Mon-Sun (7 days). - Week 2: Mon-Sun (7 days). - Week 3: Mon-Sun (7 days). - Total 21 days. - If Mar 16 is a Tuesday (let's check). - Today is Oct 2023. March 2026... - Actually, I don't need to know the day of week for the output format requested (`YYYY-MM-DD:`), but it helps verify logic. - Let's assume "3 weeks" means exactly 21 days duration inclusive. - Start: Mar 16. End: Apr 5. - Wait, is there an ambiguity where "3 weeks" implies ending on the last day of the 3rd week? - If Week 1 ends Sunday (Mar 22). - Week 2 ends Sunday (Mar 29). - Week 3 ends Sunday (Apr 5). - So Apr 5 is consistent. - Wait, let's check the date calculation one more time carefully. - March 16 to March 31 = 16 days inclusive? No. - Count: 16, 17, 18, 19, 20, 21, 22 (7), 23, 24, 25, 26, 27, 28, 29, 30, 31 (16). - So March has 16 days in the program. - Total needed: 21 days. - Remaining: 21 - 16 = 5 days. - April 1, 2, 3, 4, 5. - So End Date is April 5, 2026. - Wait, I need to make sure I don't miss the start date in the list. The prompt asks for "dates from the start to the end". Usually implies inclusive list. - Format: `YYYY-MM-DD:` on each line. 4. **Drafting the List:** - Start: 2026-03-16 - End: 2026-04-05 - Count: 21 lines. 5. **Refining the Output:** - The prompt asks for "dates from the start to the end". - It shows an example format `2026-03-16:`. - I need to generate all dates in between. - Let's double check if "3 weeks" could mean 3 calendar weeks (e.g., ending on a specific day of the week). Usually, without specifying days of week, it means duration. - However, sometimes "3 weeks program" might imply Week 1, Week 2, Week 3 where Week 3 ends on the same weekday as Start + 14? No, that's 2 weeks. - Standard interpretation: Duration = 21 days. - Let's check if there is any nuance about "program". Usually means inclusive of all training days or calendar days. I will assume every day (calendar days) for the list generation unless specified otherwise ("working days"). The prompt asks to "Generate dates", implying a full list. - Wait, one more check on the end date calculation. - Mar 16 + 20 days = Apr 5? - March has 31 days. - Days in March starting from 16th: 16, 17... 31. Count = 31 - 16 + 1 = 16 days. - Total needed = 21 days. - Remaining = 21 - 16 = 5 days. - April starts at day 0 offset? No, April 1 is the next day after March 31. - So we need 5 more dates in April. - Apr 1 (Day 17), Apr 2 (Day 18), Apr 3 (Day 19), Apr 4 (Day 20), Apr 5 (Day 21). - Yes, End Date is 2026-04-05. - Wait, I should check if the user implies "Weeks" as in Monday-Sunday blocks? - If Mar 16 is a Tuesday (Let's verify: Jan 1 2026 is Thursday. Feb has 28 days (not leap). March 1 is Sunday. March 16 is Monday? - Jan 1 2026 = Thu. - Days in Jan: 31. Feb 1 = Fri + 31%7 = 3 -> Mon? No. - Let's use a known anchor. Today Oct 24, 2024 is Friday. - Mar 16, 2025... - Actually, I don't need the day of week for the output format `YYYY-MM-DD:`. The calculation holds regardless of weekday unless "Week" implies specific boundaries (e.g., ending on Sunday). But usually "3 weeks program" means duration. - However, if it's a "program", sometimes people count only weekdays? No, prompt asks to generate dates in the format `YYYY-MM-DD`, implying daily listing. I will list every day. - Wait, is there any chance "3 weeks" means 21 days but excluding weekends? - Prompt: "Generate dates from the start to the end". This implies a continuous timeline of dates. If it meant working days, it would usually specify "working days". I will assume calendar days. - Wait, looking at the instruction "etc". It wants me to list them all. - Okay, I will generate 21 lines from Mar 16 to Apr 5. - Wait, let's re-verify the end date one more time. - Start: Mar 16. - End of Week 1 (7 days): Mar 23? No. - Day 1: 16 - Day 7: 22 - Day 8: 23 - ... - Day 14: 29 - Day 15: 30 - Day 21: Apr 5. - Okay, calculation is solid. 6. **Final check of the output format:** - `YYYY-MM-DD:` - No extra text, just the list? The prompt says "Generate dates... in this format". I should provide the list directly. - Wait, looking at the user prompt: "2026-03-16:\n2026-03-17:\netc". It implies a list. - I will output the full list from Mar 16 to Apr 5. - Wait, one nuance: Does "3 weeks" mean ending on the day that completes the 3rd week? Yes. - Does it include the start date? Yes ("from the start"). - So inclusive count is correct. - Let's check if there are any leap year issues. 2026 is not a leap year (divisible by 4? No, 26/4 = 6.5). Feb has 28 days. March has 31. April has 30. - Calculation holds. - Wait, I need to make sure I don't hallucinate the end date. - Mar 16 + 20 days. - Mar 16 -> Mar 31 is 15 days gap (17..31). - So Mar 31 is Day 16. - Apr 1 is Day 17. - Apr 2 is Day 18. - Apr 3 is Day 19. - Apr 4 is Day 20. - Apr 5 is Day 21. - Correct. - Wait, I should check if the prompt implies just listing the dates or filling in content? "Generate dates... in this format". Just the dates with colons. - Okay, ready to generate. - Wait, one more thing. Is it possible the user considers "3 weeks" as 21 days but starting from Day 0? No, standard is inclusive. - I will stick with Mar 16 to Apr 5 (21 lines). - Wait, let's check if there is a common interpretation where "3 weeks" means ending on the same day of the week as start + 14 days? No, that's 2 weeks. - Okay, proceeding with Mar 16 to Apr 5. - Wait, I need to count the lines carefully. - Line 1: Mar 16 - ... - Line 21: Apr 5. - Total 21 lines. - Let's write them out mentally to ensure no skipping. - 16, 17, 18, 19, 20, 21, 22 (Week 1) - 23, 24, 25, 26, 27, 28, 29 (Week 2) - 30, 31, Apr 1, Apr 2, Apr 3, Apr 4, Apr 5 (Week 3) - Wait. Week 1: 16-22 (7 days). - Week 2: 23-29 (7 days). - Week 3: 30-Apr 5 (7 days). - Total 21 days. - Wait, Mar 30 to Apr 5 is 7 days? - 30, 31 (2) - 1, 2, 3, 4, 5 (5) - Total 7. Yes. - So the list ends on April 5. - Wait, I need to check if "etc" in the prompt implies I should stop at a certain point? No, it's an example of format. "Generate dates from the start to the end". - Okay, full list. - One more check: 2026-03-16 is a Monday (Let's verify). - Jan 1 2024 was Mon. - 2025 is not leap. 2026 is not leap. - Mar 16, 2026... - Actually, I don't need to know the weekday for the output format `YYYY-MM-DD:`. The prompt example uses `2026-03-16:`. - Okay, generating the list. - Wait, is there any chance "3 weeks" means 3 calendar weeks (e.g. Mar 16 to Apr 5)? Yes, that's what I calculated. - Is there a chance it means 21 days but excluding weekends? No, usually "dates from start to end" implies calendar dates unless specified "working days". - Okay, proceeding with calendar days. - Wait, one detail: The prompt example shows `2026-03-16:` then newline `2026-03-17:`. - I will follow this exactly. - Final check on date arithmetic. - Start: 2026-03-16 - End: 2026-04-05 - Count: 21 days. - List generation. - Wait, I should check if the prompt implies a specific end date logic like "End of program". Usually means last day included. - Okay. - Wait, is it possible the user wants me to stop at the 3rd week's Sunday? - If Mar 16 is Monday (hypothetically). - Week 1: Mon-Sun. - Week 2: Mon-Sun. - Week 3: Mon-Sun. - This results in the same date range if we count days continuously. - Okay, I will output the continuous list. - Wait, one detail on formatting. The prompt shows `2026-03-16:` with a colon at the end of each line. - I must include the colon. - Plan: 1. Start at 2026-03-16. 2. Increment day by day until 2026-04-05. 3. Format as `YYYY-MM-DD:`. 4. Ensure no markdown code blocks unless requested (prompt didn't explicitly ask for code block, but usually clean text is better). However, to ensure formatting is preserved, I might use a code block or just plain text. The prompt example looks like plain text. I will output plain text. Wait, looking at the instruction "Generate dates... in this format". I'll provide the list directly. 5. Actually, providing it as a code block makes it easier to copy paste and ensures no markdown rendering issues with colons if any (though colons are fine). But standard practice for these requests is usually plain text or code block. I'll use plain text but ensure line breaks are correct. Wait, actually, using a code block is safer for preserving the exact format requested without extra whitespace interpretation. But the prompt example doesn't show code blocks. I will just output the text. 6. Wait, looking at previous instructions for similar tasks, usually direct text is preferred unless it's code. I'll output plain text. - Re-evaluating "3 weeks". - If a program starts on March 16 and lasts 3 weeks. - Does it end on April 5? Yes (21 days). - Okay, generating the list now. - Wait, I need to make sure I don't produce too much text if not needed, but "etc" implies full list. - Okay, full list from Mar 16 to Apr 5. - One last check: Is there any ambiguity about "3 weeks"? - Sometimes people say "I'm on a 3 week program starting Monday". They might mean the next 21 days. - Okay, I'll stick with 21 days inclusive. - Wait, checking if 2026 is a leap year. 2024 was leap. 2028 will be. 2026 is not. Feb has 28 days. - My calculation relied on March having 31 days. That is constant. - So April 5 is correct. - Wait, I'll count the lines to ensure accuracy in my head before outputting. - Mar: 16, 17, 18, 19, 20, 21, 22 (7) - Mar: 23, 24, 25, 26, 27, 28, 29 (7) - Mar: 30, 31 (2) - Apr: 1, 2, 3, 4, 5 (5) - Total: 7+7+2+5 = 21. Correct. - Okay, ready to write. 2026-03-16: 2026-03-17: 2026-03-18: 2026-03-19: 2026-03-20: 2026-03-21: 2026-03-22: 2026-03-23: 2026-03-24: 2026-03-25: 2026-03-26: 2026-03-27: 2026-03-28: 2026-03-29: 2026-03-30: 2026-03-31: 2026-04-01: 2026-04-02: 2026-04-03: 2026-04-04: 2026-04-05: ``` If you made it here, congratulations on not frying your attention span with tiktok. More seriously, that's a 15 pages essay! To write 21 lines... We're talking kafkaesk communist administration inefficiency. But contrarily to said administrations, it got the answer right. And that's why AI is magical. The end. --- *For context, I was using qwen3.5-9b with increased token window of 32768 but no modification to any other setting like temperature, and, most importantly, without a harness.* *Written in 2026-03*