To date / up to now (迄今为止/至今)

Structure 迄今为止 / 至今，… (continuity up to the present)；时至今日，… (after so long, still today…)

迄今为止 (qìjīn wéizhǐ) and 至今 (zhìjīn) mark that something extends or remains unresolved up to the moment of speaking: "to date", "up to now". 迄今为止 opens the clause as a stocktaking ("to date there is still no conclusion"); 至今 goes before the verb and tends to accompany a lingering state (尚 / 仍 / 还). 时至今日 (shí zhì jīnrì) adds the nuance of "after so much time has passed, even today…", with a tone of reproach or resignation: 时至今日，问题依旧 = "at this point, the problem is still the same". All three are written, cultured register; 迄 takes the reading qì.

Examples

迄qì今jīn为wéi止zhǐ，这zhè一yī现xiàn象xiàng尚shàng无wú定dìng论lùn。
To date, there is still no settled conclusion on this phenomenon.
这zhè座zuò古gǔ桥qiáo至zhì今jīn仍réng在zài使shǐ用yòng。
This ancient bridge is still in use to this day.
时shí至zhì今jīn日rì，许xǔ多duō问wèn题tí依yī旧jiù没méi有yǒu解jiě决jué。
Even now, after all this time, many problems remain unresolved.
该gāi方fāng案àn至zhì今jīn未wèi获huò通tōng过guò。
To date, that plan has not been approved.

Levels are indicative: they follow the standard Chinese Grammar Wiki (AllSet Learning) progression, not an official HSK 3.0 mapping. We never assign levels by eye.

This point and the other 370, with audio on every example, inside Wanyu.