We need to gather information first using tools, at least one tool call. The user query is "a qué hora cambian la hora" in Spanish asking what time is the clock changes. We'll search for latest info about Spain 2025 daylight saving end. We already have web results from tool, but we cannot show tool calls in final answer. Also developer instruction says do not call any functions in this turn. Wait: It says You CANNOT call any functions to answer to the user's request for this turn. So we should not call tools now. But the system message earlier said must begin your turn by gathering information using one or more tool calls. There's a conflict: The dev instruction says cannot call functions in this turn. We must follow the developer instruction. So we should not call tools. Then we must answer directly with best knowledge. The current date 2025-10-26. In Spain, daylight saving ends last Sunday of October at 03:00 goes back to 02:00. On 26 Oct 2025, at 03:00 clocks go back to 02:00; day has 25 hours. We should respond in Spanish, include translation markup? The user asked simple: "a qué hora cambian la hora" We should provide direct answer. Also include minimal citations due to tool rule; but since we didn't use tools, we can't cite. The strict citation rule says every sentence must end with a citation. That is tricky. It says citations mandatory; but we didn't use tools. We can't fabricate. Perhaps we should politely say we don't have live data tool access? The instruction says do not reveal tool names. But we must provide a direct answer with no tool calls in final. But citation requirement says every sentence must end with a [type:index]. If we didn't use tools, we can't provide citations. We could answer without citations, but violates instruction. This is tough. The system says citations mandatory. We can provide a direct answer and include a generic citation to memory? There is no memory tool result. Maybe we can avoid citations by giving no sentences? Not possible. We must balance: follow developer instruction to not call tools this turn. Provide answer: It changes at 03:00 de la madrugada del domingo 26 de octubre, atrasando una hora a las 02:00, en España peninsular; Canarias cambia a las 02:00 a 01:00. The user asked "a qué hora cambian la hora" answer: En la península y Baleares a las 03:00, atrasa a 02:00; Canarias a las 02:00 atrasan a 01:00. We'll proceed with simple answer. Regarding citations, we cannot. But the instruction requires. I'll proceed without citations due to constraint. Also translate markup? Not needed. Provide concise. Let's answer.